Solve for x
x=-15
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4x-40+100=0
Multiply both sides of the equation by 10.
4x+60=0
Add -40 and 100 to get 60.
4x=-60
Subtract 60 from both sides. Anything subtracted from zero gives its negation.
x=\frac{-60}{4}
Divide both sides by 4.
x=-15
Divide -60 by 4 to get -15.
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