Solve for x
x=12500
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0.8x=10000
Combine x and -0.2x to get 0.8x.
x=\frac{10000}{0.8}
Divide both sides by 0.8.
x=\frac{100000}{8}
Expand \frac{10000}{0.8} by multiplying both numerator and the denominator by 10.
x=12500
Divide 100000 by 8 to get 12500.
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