3(a-12)=9

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Solution for 3(a-12)=9 equation:



3(a-12)=9
We move all terms to the left:
3(a-12)-(9)=0
We multiply parentheses
3a-36-9=0
We add all the numbers together, and all the variables
3a-45=0
We move all terms containing a to the left, all other terms to the right
3a=45
a=45/3
a=15

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