Solve for x
x=-17
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12x+85-7x=0
Subtract 7x from both sides.
5x+85=0
Combine 12x and -7x to get 5x.
5x=-85
Subtract 85 from both sides. Anything subtracted from zero gives its negation.
x=\frac{-85}{5}
Divide both sides by 5.
x=-17
Divide -85 by 5 to get -17.
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