7(3a+1)=49

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Solution for 7(3a+1)=49 equation: 



7(3a+1)=49

We move all terms to the left:

7(3a+1)-(49)=0

We multiply parentheses

21a+7-49=0

We add all the numbers together, and all the variables

21a-42=0

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

21a=42

a=42/21

a=2

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