Solve for x
x=10
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57-3x-4x=-13
Subtract 4x from both sides.
57-7x=-13
Combine -3x and -4x to get -7x.
-7x=-13-57
Subtract 57 from both sides.
-7x=-70
Subtract 57 from -13 to get -70.
x=\frac{-70}{-7}
Divide both sides by -7.
x=10
Divide -70 by -7 to get 10.
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