Solve for x
x=30
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360-9x=3x
Use the distributive property to multiply 9 by 40-x.
360-9x-3x=0
Subtract 3x from both sides.
360-12x=0
Combine -9x and -3x to get -12x.
-12x=-360
Subtract 360 from both sides. Anything subtracted from zero gives its negation.
x=\frac{-360}{-12}
Divide both sides by -12.
x=30
Divide -360 by -12 to get 30.
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