3a+4=12-a

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Solution for 3a+4=12-a equation: 



3a+4=12-a

We move all terms to the left:

3a+4-(12-a)=0

We add all the numbers together, and all the variables

3a-(-1a+12)+4=0

We get rid of parentheses

3a+1a-12+4=0

We add all the numbers together, and all the variables

4a-8=0

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

4a=8

a=8/4

a=2

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