Solve for x
x=420
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x\times 0.12=50.4
Multiply 72 and 0.7 to get 50.4.
x=\frac{50.4}{0.12}
Divide both sides by 0.12.
x=\frac{5040}{12}
Expand \frac{50.4}{0.12} by multiplying both numerator and the denominator by 100.
x=420
Divide 5040 by 12 to get 420.
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