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8(-2+a)-3=6a+13
We move all terms to the left:
8(-2+a)-3-(6a+13)=0
We add all the numbers together, and all the variables
8(a-2)-(6a+13)-3=0
We multiply parentheses
8a-(6a+13)-16-3=0
We get rid of parentheses
8a-6a-13-16-3=0
We add all the numbers together, and all the variables
2a-32=0
We move all terms containing a to the left, all other terms to the right
2a=32
a=32/2
a=16
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