Solve for x
x=180
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-2x+360=0
Swap sides so that all variable terms are on the left hand side.
-2x=-360
Subtract 360 from both sides. Anything subtracted from zero gives its negation.
x=\frac{-360}{-2}
Divide both sides by -2.
x=180
Divide -360 by -2 to get 180.
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