If 2x + y = 6 and x + 2y = 9 then find the
value of x + y.
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Answer:
the answer is all yours X + Y is equal to zero
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2x+y=6. ......(1)
2x=6-y
x= 6-y÷2
x+2y=9. ........(2)
Substitute the value
of x =6-y÷ 2 in equation 2
6-y÷2+2y=9
6-y+4y÷2=9
6+3y÷2=9
Doing cross multiply
1×(6+3y) =9×2
6+3y=18
3y=18-6
3y=12
y=12÷3
y=4
substitute the value of
y=4 in equation (1)
2x+4=6
2x=6-4
2x=2
X=2÷2
X=1
so the value of
X=1 and
y=4
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