3(2a-1)-(a+4)=8

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Solution for 3(2a-1)-(a+4)=8 equation: 



3(2a-1)-(a+4)=8

We move all terms to the left:

3(2a-1)-(a+4)-(8)=0

We multiply parentheses

6a-(a+4)-3-8=0

We get rid of parentheses

6a-a-4-3-8=0

We add all the numbers together, and all the variables

5a-15=0

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

5a=15

a=15/5

a=3

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