Solve for x
x=30
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2.8x-x=54
Subtract x from both sides.
1.8x=54
Combine 2.8x and -x to get 1.8x.
x=\frac{54}{1.8}
Divide both sides by 1.8.
x=\frac{540}{18}
Expand \frac{54}{1.8} by multiplying both numerator and the denominator by 10.
x=30
Divide 540 by 18 to get 30.
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