Solve for y
y=15
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240-12y+8y=180
Use the distributive property to multiply 12 by 20-y.
240-4y=180
Combine -12y and 8y to get -4y.
-4y=180-240
Subtract 240 from both sides.
-4y=-60
Subtract 240 from 180 to get -60.
y=\frac{-60}{-4}
Divide both sides by -4.
y=15
Divide -60 by -4 to get 15.
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