Solve for a
a=3
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13-2a+2=6+a
Use the distributive property to multiply -2 by a-1.
15-2a=6+a
Add 13 and 2 to get 15.
15-2a-a=6
Subtract a from both sides.
15-3a=6
Combine -2a and -a to get -3a.
-3a=6-15
Subtract 15 from both sides.
-3a=-9
Subtract 15 from 6 to get -9.
a=\frac{-9}{-3}
Divide both sides by -3.
a=3
Divide -9 by -3 to get 3.
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