Add and .

Subtract from both sides of the equation.

Subtract from both sides of the equation.

Subtract from .

Solve for x (x+7)+55+y=180

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# Solve for x (x+7)+55+y=180

Add and .

Subtract from both sides of the equation.

Subtract from both sides of the equation.

Subtract from .

Solve for x (x+7)+55+y=180