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4(2a+3)=-3(9-1+31)
We move all terms to the left:
4(2a+3)-(-3(9-1+31))=0
We add all the numbers together, and all the variables
4(2a+3)-(-339)=0
We add all the numbers together, and all the variables
4(2a+3)+339=0
We multiply parentheses
8a+12+339=0
We add all the numbers together, and all the variables
8a+351=0
We move all terms containing a to the left, all other terms to the right
8a=-351
a=-351/8
a=-43+7/8
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