7(3a-2)=40

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Solution for 7(3a-2)=40 equation: 



7(3a-2)=40

We move all terms to the left:

7(3a-2)-(40)=0

We multiply parentheses

21a-14-40=0

We add all the numbers together, and all the variables

21a-54=0

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

21a=54

a=54/21

a=2+4/7

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