Solve for x
x=11.25
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0.8x-4.5=4.5
Multiply 1.5 and 3 to get 4.5.
0.8x=4.5+4.5
Add 4.5 to both sides.
0.8x=9
Add 4.5 and 4.5 to get 9.
x=\frac{9}{0.8}
Divide both sides by 0.8.
x=\frac{90}{8}
Expand \frac{9}{0.8} by multiplying both numerator and the denominator by 10.
x=\frac{45}{4}
Reduce the fraction \frac{90}{8} to lowest terms by extracting and canceling out 2.
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