3(2a-7)+84=4a

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Solution for 3(2a-7)+84=4a equation: 



3(2a-7)+84=4a

We move all terms to the left:

3(2a-7)+84-(4a)=0

We add all the numbers together, and all the variables

-4a+3(2a-7)+84=0

We multiply parentheses

-4a+6a-21+84=0

We add all the numbers together, and all the variables

2a+63=0

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

2a=-63

a=-63/2

a=-31+1/2

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