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-8(1-7a)-5a=349
We move all terms to the left:
-8(1-7a)-5a-(349)=0
We add all the numbers together, and all the variables
-8(-7a+1)-5a-349=0
We add all the numbers together, and all the variables
-5a-8(-7a+1)-349=0
We multiply parentheses
-5a+56a-8-349=0
We add all the numbers together, and all the variables
51a-357=0
We move all terms containing a to the left, all other terms to the right
51a=357
a=357/51
a=7
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