Solve for x
x=-180
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900+x+4x=0
Multiply both sides of the equation by 60, the least common multiple of 60,15.
900+5x=0
Combine x and 4x to get 5x.
5x=-900
Subtract 900 from both sides. Anything subtracted from zero gives its negation.
x=\frac{-900}{5}
Divide both sides by 5.
x=-180
Divide -900 by 5 to get -180.
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