3(7a-10)=12

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Solution for 3(7a-10)=12 equation: 



3(7a-10)=12

We move all terms to the left:

3(7a-10)-(12)=0

We multiply parentheses

21a-30-12=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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