Solve for x
x=-0.4
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-9x=4-0.4
Subtract 0.4 from both sides.
-9x=3.6
Subtract 0.4 from 4 to get 3.6.
x=\frac{3.6}{-9}
Divide both sides by -9.
x=\frac{36}{-90}
Expand \frac{3.6}{-9} by multiplying both numerator and the denominator by 10.
x=-\frac{2}{5}
Reduce the fraction \frac{36}{-90} to lowest terms by extracting and canceling out 18.
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