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

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We multiply parentheses

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

We get rid of parentheses

a+4a-3a+2-8=0

We add all the numbers together, and all the variables

2a-6=0

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

2a=6

a=6/2

a=3

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