7+a=12-4a

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Solution for 7+a=12-4a equation: 



7+a=12-4a

We move all terms to the left:

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

We add all the numbers together, and all the variables

a-(-4a+12)+7=0

We get rid of parentheses

a+4a-12+7=0

We add all the numbers together, and all the variables

5a-5=0

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

5a=5

a=5/5

a=1

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