Solve for x
x=160
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2x+80=400
Combine x and x to get 2x.
2x=400-80
Subtract 80 from both sides.
2x=320
Subtract 80 from 400 to get 320.
x=\frac{320}{2}
Divide both sides by 2.
x=160
Divide 320 by 2 to get 160.
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