Solve for x
x=900.5
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0.4x-280=80.2
Swap sides so that all variable terms are on the left hand side.
0.4x=80.2+280
Add 280 to both sides.
0.4x=360.2
Add 80.2 and 280 to get 360.2.
x=\frac{360.2}{0.4}
Divide both sides by 0.4.
x=\frac{3602}{4}
Expand \frac{360.2}{0.4} by multiplying both numerator and the denominator by 10.
x=\frac{1801}{2}
Reduce the fraction \frac{3602}{4} to lowest terms by extracting and canceling out 2.
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