Question

x+18 = 2 y ; - y = 2x -9
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Answer 1

Answer:

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Answer 2

Step-by-step explanation:

x+18=18

So,

x=2y-18 ( Mark it as eq 1 )

Put eq 1 in -y=2x-9

Then,

To find value of y

-y=2(2y-18)-9

-y=4y-36-9

-y-4y=-45

-5y=-45

y=-45/-5

y=9

To find value of x

x=2y-18 ( From eq 1 )

x=2×9-18

x=18-18

x=0