Solve for x
x=60
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4x-160-80=0
Multiply 40 and 4 to get 160.
4x-240=0
Subtract 80 from -160 to get -240.
4x=240
Add 240 to both sides. Anything plus zero gives itself.
x=\frac{240}{4}
Divide both sides by 4.
x=60
Divide 240 by 4 to get 60.
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