Solve for x
x=100
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28x+1600-20x=2400
Use the distributive property to multiply 80-x by 20.
8x+1600=2400
Combine 28x and -20x to get 8x.
8x=2400-1600
Subtract 1600 from both sides.
8x=800
Subtract 1600 from 2400 to get 800.
x=\frac{800}{8}
Divide both sides by 8.
x=100
Divide 800 by 8 to get 100.
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