3a=a+3+a+3+a+7+a+7

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Solution for 3a=a+3+a+3+a+7+a+7 equation: 



3a=a+3+a+3+a+7+a+7

We move all terms to the left:

3a-(a+3+a+3+a+7+a+7)=0

We add all the numbers together, and all the variables

3a-(4a+20)=0

We get rid of parentheses

3a-4a-20=0

We add all the numbers together, and all the variables

-1a-20=0

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

-a=20

a=20/-1

a=-20

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