(x+y)2=18

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Solution for (x+y)2=18 equation: 


Simplifying
(x + y) * 2 = 18

Reorder the terms for easier multiplication:
2(x + y) = 18
(x * 2 + y * 2) = 18
(2x + 2y) = 18

Solving
2x + 2y = 18

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-2y' to each side of the equation.
2x + 2y + -2y = 18 + -2y

Combine like terms: 2y + -2y = 0
2x + 0 = 18 + -2y
2x = 18 + -2y

Divide each side by '2'.
x = 9 + -1y

Simplifying
x = 9 + -1y

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