Linear Equations
> Question
MCQ
1 mark
Year: 2024
Easy
CBSE Class 10
linear-equations
simultaneous-equations
Question
If
a
x
+
b
y
=
a
2
−
b
2
and
b
x
+
a
y
=
0
, then the value of
x
+
y
is:
Solution
1
Adding both equations:
(
a
+
b
)
x
+
(
a
+
b
)
y
=
a
2
−
b
2
⇒
(
a
+
b
)
(
x
+
y
)
=
(
a
+
b
)
(
a
−
b
)
⇒
x
+
y
=
a
−
b
+1 mark
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