Solve for a
a=-6
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-0.4a=3.6-1.2
Subtract 1.2 from both sides.
-0.4a=2.4
Subtract 1.2 from 3.6 to get 2.4.
a=\frac{2.4}{-0.4}
Divide both sides by -0.4.
a=\frac{24}{-4}
Expand \frac{2.4}{-0.4} by multiplying both numerator and the denominator by 10.
a=-6
Divide 24 by -4 to get -6.
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