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2x+2x+x+180=720
Multiply both sides of the equation by 2.
4x+x+180=720
Combine 2x and 2x to get 4x.
5x+180=720
Combine 4x and x to get 5x.
5x=720-180
Subtract 180 from both sides.
5x=540
Subtract 180 from 720 to get 540.
x=\frac{540}{5}
Divide both sides by 5.
x=108
Divide 540 by 5 to get 108.