Solve for x
x=2.16
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5x=10.8
Combine 3.5x and 1.5x to get 5x.
x=\frac{10.8}{5}
Divide both sides by 5.
x=\frac{108}{50}
Expand \frac{10.8}{5} by multiplying both numerator and the denominator by 10.
x=\frac{54}{25}
Reduce the fraction \frac{108}{50} to lowest terms by extracting and canceling out 2.
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