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-8(4-+a)+3(2a+1)=-19
We move all terms to the left:
-8(4-+a)+3(2a+1)-(-19)=0
We add all the numbers together, and all the variables
-8(+a)+3(2a+1)-(-19)=0
We add all the numbers together, and all the variables
-8(+a)+3(2a+1)+19=0
We multiply parentheses
-8a+6a+3+19=0
We add all the numbers together, and all the variables
-2a+22=0
We move all terms containing a to the left, all other terms to the right
-2a=-22
a=-22/-2
a=+11
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