Solve for x
x=10
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15+2.5x-4x=0
Subtract 4x from both sides.
15-1.5x=0
Combine 2.5x and -4x to get -1.5x.
-1.5x=-15
Subtract 15 from both sides. Anything subtracted from zero gives its negation.
x=\frac{-15}{-1.5}
Divide both sides by -1.5.
x=\frac{-150}{-15}
Expand \frac{-15}{-1.5} by multiplying both numerator and the denominator by 10.
x=10
Divide -150 by -15 to get 10.
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