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3-x=\frac{-1.8}{-1.2}
Divide both sides by -1.2.
3-x=\frac{-18}{-12}
Expand \frac{-1.8}{-1.2} by multiplying both numerator and the denominator by 10.
3-x=\frac{3}{2}
Reduce the fraction \frac{-18}{-12} to lowest terms by extracting and canceling out -6.
-x=\frac{3}{2}-3
Subtract 3 from both sides.
-x=\frac{3}{2}-\frac{6}{2}
Convert 3 to fraction \frac{6}{2}.
-x=\frac{3-6}{2}
Since \frac{3}{2} and \frac{6}{2} have the same denominator, subtract them by subtracting their numerators.
-x=-\frac{3}{2}
Subtract 6 from 3 to get -3.
x=\frac{3}{2}
Multiply both sides by -1.