Solve for x
x=20
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0.1x=-1+3
Add 3 to both sides.
0.1x=2
Add -1 and 3 to get 2.
x=\frac{2}{0.1}
Divide both sides by 0.1.
x=20
Expand \frac{2}{0.1} by multiplying both numerator and the denominator by 10. Anything divided by one gives itself.
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