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Standard IX
Mathematics
Question
Solve
x
+
y
=
3
,
2
x
+
5
y
=
12
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Solution
Verified by Toppr
By the method of substitution,
x
+
y
=
3
⇒
x
=
3
−
y
2
x
+
5
y
=
12
⇒
2
(
3
−
y
)
+
5
y
=
12
⇒
6
−
2
y
+
5
y
=
12
⇒
3
y
=
12
−
6
=
6
∴
y
=
6
3
=
2
And
x
=
3
−
y
=
3
−
2
=
1
∴
x
=
1
,
y
=
2
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Q5
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