ICSE Board Practice

ICSE Grade IX - Linear Equations and Simultaneous Linear Equations
Question 1
1.
    • Solve the following pair of equations :
    •  
       
      3

       
       
      (
      4
      x
      +
      y
      )
         
       
       
      7

       
       
      (
      4
      x
      y
      )
      =
       
       
      54
    •  
       
      11

       
       
      (
      4
      x
      +
      y
      )
         
       
       
      1

       
       
      (
      4
      x
      y
      )
      =
       
       
      (
      24
      )
  • (
    (
    -1

    18
    )
    ,
    (
    -1

    3
    )
    )
  • (
    (
    -1

    18
    )
    ,
    (
    -1

    9
    )
    )
  • (
    (
    -1

    18
    )
    ,
    (
    -1

    7
    )
    )
  • (
    1

    18
    ,
    (
    -1

    9
    )
    )
  • (
    (
    -1

    20
    )
    ,
    (
    -1

    9
    )
    )
Question 2
2.
    • Solve :
    •  
       
      (
      x
      5
      )

       
       
      5
        +  
       
       
      x

       
       
      8
      =
       
       
      (
      x
      +
      3
      )

       
       
      8
  • 109

    4
  • 55

    2
  • 28
  • 53

    2
  • 57

    2
Question 3
3.
    • Find the set of points satisfying the equation
    • x
      =
      (
      1

      11
      y
      +
      59

      11
      )
    • (
      (
      2
      )
      ,
      81
      )
    • ,
    • (
      (
      1
      )
      ,
      70
      )
    • ,
    • (
      0
      ,
      59
      )
    • ,
    • (
      1
      ,
      48
      )
    • ,
    • (
      2
      ,
      37
      )
    • (
      (
      2
      )
      ,
      81
      )
    • ,
    • (
      (
      1
      )
      ,
      70
      )
    • ,
    • (
      0
      ,
      59
      )
    • ,
    • (
      1
      ,
      48
      )
    • ,
    • (
      4
      ,
      39
      )
    • (
      (
      2
      )
      ,
      81
      )
    • ,
    • (
      (
      1
      )
      ,
      70
      )
    • ,
    • (
      (
      2
      )
      ,
      57
      )
    • ,
    • (
      1
      ,
      48
      )
    • ,
    • (
      2
      ,
      37
      )
    • (
      (
      2
      )
      ,
      81
      )
    • ,
    • (
      (
      1
      )
      ,
      70
      )
    • ,
    • (
      1
      ,
      58
      )
    • ,
    • (
      1
      ,
      48
      )
    • ,
    • (
      2
      ,
      37
      )
    • (
      (
      2
      )
      ,
      81
      )
    • ,
    • (
      (
      1
      )
      ,
      70
      )
    • ,
    • (
      0
      ,
      59
      )
    • ,
    • (
      0
      ,
      49
      )
    • ,
    • (
      2
      ,
      37
      )
Question 4
4.
    • Solve the equation
    • (
      7
      x
      +
      5

      4
      )
      =
      (
      2

      7
      )
  • (
    -43

    194
    )
  • (
    -43

    198
    )
  • (
    -45

    196
    )
  • (
    -41

    196
    )
  • (
    -43

    196
    )
Question 5
5.
    • In an examination, the ratio of passes to failures was 9 : 5.
    • Had 245 less appeared and 10 less passed, the ratio of passes to failures would have been 106 : 13.
    • How many students appeared for the examination?
  • 830
  • 835
  • 840
  • 850
  • 845
Question 6
6.
    • Find the set of points satisfying the equation
    • (
      9
      x
      3
      y
      27
      )
      =
      0
    • (
      (
      2
      )
      ,
      (
      3
      )
      )
    • ,
    • (
      (
      1
      )
      ,
      (
      6
      )
      )
    • ,
    • (
      0
      ,
      (
      9
      )
      )
    • ,
    • (
      1
      ,
      (
      12
      )
      )
    • ,
    • (
      2
      ,
      (
      15
      )
      )
    • (
      (
      2
      )
      ,
      (
      3
      )
      )
    • ,
    • (
      (
      1
      )
      ,
      (
      6
      )
      )
    • ,
    • (
      1
      ,
      (
      10
      )
      )
    • ,
    • (
      1
      ,
      (
      12
      )
      )
    • ,
    • (
      2
      ,
      (
      15
      )
      )
    • (
      (
      2
      )
      ,
      (
      3
      )
      )
    • ,
    • (
      (
      1
      )
      ,
      (
      6
      )
      )
    • ,
    • (
      (
      2
      )
      ,
      (
      11
      )
      )
    • ,
    • (
      1
      ,
      (
      12
      )
      )
    • ,
    • (
      2
      ,
      (
      15
      )
      )
    • (
      (
      2
      )
      ,
      (
      3
      )
      )
    • ,
    • (
      (
      1
      )
      ,
      (
      6
      )
      )
    • ,
    • (
      0
      ,
      (
      9
      )
      )
    • ,
    • (
      0
      ,
      (
      11
      )
      )
    • ,
    • (
      2
      ,
      (
      15
      )
      )
    • (
      (
      2
      )
      ,
      (
      3
      )
      )
    • ,
    • (
      (
      1
      )
      ,
      (
      6
      )
      )
    • ,
    • (
      0
      ,
      (
      9
      )
      )
    • ,
    • (
      1
      ,
      (
      12
      )
      )
    • ,
    • (
      4
      ,
      (
      13
      )
      )
Question 7
7.
    • Which of the following equations is the same as
    • (
      7
      x
      6
      )
      =
      0
  • (
    7
    x
    10
    )
    =
    (
    9
    )
  • (
    7
    x
    7
    )
    =
    (
    4
    )
  • (
    7
    x
    10
    )
    =
    (
    4
    )
  • (
    7
    x
    10
    )
    =
    1
  • (
    7
    x
    13
    )
    =
    (
    4
    )
Question 8
8.
    • The additive inverse of the expression
    • 7
    • is
  • (
    7
    )
  • (
    8
    )
  • (
    4
    )
  • 7
  • (
    9
    )
Question 9
9.
    • The L.H.S of the equation
    • (
      8
      x
      6
      )
      =
      7
    • is
  • (
    8
    x
    6
    )
  • (
    8
    x
    8
    )
  • (
    7
    x
    6
    )
  • (
    8
    x
    3
    )
  • 7
Question 10
10.
    • Which of the following equations is not the same as
    • (
      5
      x
      1
      )
      =
      (
      4
      x
      1
      )
  • (
    25
    x
    +
    5
    )
    =
    (
    4
    x
    6
    )
  • (
    20
    x
    +
    4
    )
    =
    (
    16
    x
    +
    4
    )
  • (
    15
    x
    +
    3
    )
    =
    (
    12
    x
    +
    3
    )
  • (
    5
    x
    +
    1
    )
    =
    (
    4
    x
    +
    1
    )
  • (
    20
    x
    4
    )
    =
    (
    16
    x
    4
    )