Solve for x
x=400
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0.15x=79.9-19.9
Subtract 19.9 from both sides.
0.15x=60
Subtract 19.9 from 79.9 to get 60.
x=\frac{60}{0.15}
Divide both sides by 0.15.
x=\frac{6000}{15}
Expand \frac{60}{0.15} by multiplying both numerator and the denominator by 100.
x=400
Divide 6000 by 15 to get 400.
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