Solve for a
a=-\frac{1}{2}=-0.5
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2a+2=\frac{-20}{-20}
Divide both sides by -20.
2a+2=1
Divide -20 by -20 to get 1.
2a=1-2
Subtract 2 from both sides.
2a=-1
Subtract 2 from 1 to get -1.
a=\frac{-1}{2}
Divide both sides by 2.
a=-\frac{1}{2}
Fraction \frac{-1}{2} can be rewritten as -\frac{1}{2} by extracting the negative sign.
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