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4(2a+3)=-39a-1)+31
We move all terms to the left:
4(2a+3)-(-39a-1)+31)=0
We add all the numbers together, and all the variables
4(2a+3)-(-39a-1)=0
We multiply parentheses
8a-(-39a-1)+12=0
We get rid of parentheses
8a+39a+1+12=0
We add all the numbers together, and all the variables
47a+13=0
We move all terms containing a to the left, all other terms to the right
47a=-13
a=-13/47
a=-13/47
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