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Byju's Answer
Standard IX
Mathematics
Solving Equations Using Method of Substitution
If x+y=c and ...
Question
If x + y = c and x - y = b, then
.
A
x=
c
+
b
2
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B
x=
c
2
+
b
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C
x=
b
2
+
c
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D
x=
c
b
2
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Solution
The correct option is
A
x=
c
+
b
2
Given that,
x + y = c...(1) and x - y = b....(2)
Now,
In equation (2), y = x - b.
By substituting the value of y in the equation (1),
we get
x + x - b = c
⇒
x =
c
+
b
2
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0
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