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4a+(8-a)=0
We add all the numbers together, and all the variables
4a+(-1a+8)=0
We get rid of parentheses
4a-1a+8=0
We add all the numbers together, and all the variables
3a+8=0
We move all terms containing a to the left, all other terms to the right
3a=-8
a=-8/3
a=-2+2/3
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