Solve for x
x=-300
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900-x+4x=0
Multiply both sides of the equation by 60, the least common multiple of 60,15.
-x+4x=-900
Subtract 900 from both sides. Anything subtracted from zero gives its negation.
3x=-900
Combine -x and 4x to get 3x.
x=\frac{-900}{3}
Divide both sides by 3.
x=-300
Divide -900 by 3 to get -300.
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