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\frac{\frac{330}{x}}{1.2}=13.75
Multiply 0.5 and 27.5 to get 13.75.
\frac{330}{x}=13.75\times 1.2
Multiply both sides by 1.2.
330=13.75\times 1.2x
Variable x cannot be equal to 0 since division by zero is not defined. Multiply both sides of the equation by x.
330=16.5x
Multiply 13.75 and 1.2 to get 16.5.
16.5x=330
Swap sides so that all variable terms are on the left hand side.
x=\frac{330}{16.5}
Divide both sides by 16.5.
x=\frac{3300}{165}
Expand \frac{330}{16.5} by multiplying both numerator and the denominator by 10.
x=20
Divide 3300 by 165 to get 20.