7(a-3)=4

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Solution for 7(a-3)=4 equation: 



7(a-3)=4

We move all terms to the left:

7(a-3)-(4)=0

We multiply parentheses

7a-21-4=0

We add all the numbers together, and all the variables

7a-25=0

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

7a=25

a=25/7

a=3+4/7

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