10a-7=21+6a

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Solution for 10a-7=21+6a equation: 



10a-7=21+6a

We move all terms to the left:

10a-7-(21+6a)=0

We add all the numbers together, and all the variables

10a-(6a+21)-7=0

We get rid of parentheses

10a-6a-21-7=0

We add all the numbers together, and all the variables

4a-28=0

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

4a=28

a=28/4

a=7

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