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4a-3=-6+a-4-8
We move all terms to the left:
4a-3-(-6+a-4-8)=0
We add all the numbers together, and all the variables
4a-(a-18)-3=0
We get rid of parentheses
4a-a+18-3=0
We add all the numbers together, and all the variables
3a+15=0
We move all terms containing a to the left, all other terms to the right
3a=-15
a=-15/3
a=-5
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