Solve for x
x=-10
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30+4x-x=0
Subtract x from both sides.
30+3x=0
Combine 4x and -x to get 3x.
3x=-30
Subtract 30 from both sides. Anything subtracted from zero gives its negation.
x=\frac{-30}{3}
Divide both sides by 3.
x=-10
Divide -30 by 3 to get -10.
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