Solve for a
a=1
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9a-6a+12=15
Use the distributive property to multiply -3 by 2a-4.
3a+12=15
Combine 9a and -6a to get 3a.
3a=15-12
Subtract 12 from both sides.
3a=3
Subtract 12 from 15 to get 3.
a=\frac{3}{3}
Divide both sides by 3.
a=1
Divide 3 by 3 to get 1.
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