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Class VI
Class VII
Class VIII
Class IX
Class X
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
)
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