Solve for x
x=15
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3x+90+144-3.6x=225
Use the distributive property to multiply 3.6 by 40-x.
3x+234-3.6x=225
Add 90 and 144 to get 234.
-0.6x+234=225
Combine 3x and -3.6x to get -0.6x.
-0.6x=225-234
Subtract 234 from both sides.
-0.6x=-9
Subtract 234 from 225 to get -9.
x=\frac{-9}{-0.6}
Divide both sides by -0.6.
x=\frac{-90}{-6}
Expand \frac{-9}{-0.6} by multiplying both numerator and the denominator by 10.
x=15
Divide -90 by -6 to get 15.
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