4(a-1)=8

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



4(a-1)=8

We move all terms to the left:

4(a-1)-(8)=0

We multiply parentheses

4a-4-8=0

We add all the numbers together, and all the variables

4a-12=0

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

4a=12

a=12/4

a=3

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