6a+9=3a+12

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Solution for 6a+9=3a+12 equation: 



6a+9=3a+12

We move all terms to the left:

6a+9-(3a+12)=0

We get rid of parentheses

6a-3a-12+9=0

We add all the numbers together, and all the variables

3a-3=0

We move all terms containing a to the left, all other terms to the right

3a=3

a=3/3

a=1

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