7(a-3)=7

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Solution for 7(a-3)=7 equation: 



7(a-3)=7

We move all terms to the left:

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

We multiply parentheses

7a-21-7=0

We add all the numbers together, and all the variables

7a-28=0

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

7a=28

a=28/7

a=4

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