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Question

x+y=18 and x2y=0
Find the value of x and y.

A
x=12 & y=6
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B
x=6 & y=12
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C
x=11 & y=7
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D
x=7 & y=11
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Solution

The correct option is A x=12 & y=6
Given x+y=18(i) and
x2y=0(ii)
Here, we use substitution method to solve the given system of equations.

From (ii) we get x=2y

Substitute the value of x in (i)

2y+y=18
3y=18
y=6

Substitute the value of y in (i)
x+6=18
x=12

x=12 & y=6

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