Solve for a
a=10
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4a+12-2\left(a+6\right)=20
Use the distributive property to multiply 4 by a+3.
4a+12-2a-12=20
Use the distributive property to multiply -2 by a+6.
2a+12-12=20
Combine 4a and -2a to get 2a.
2a=20
Subtract 12 from 12 to get 0.
a=\frac{20}{2}
Divide both sides by 2.
a=10
Divide 20 by 2 to get 10.
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