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-(1-4a)-6a=-16
We move all terms to the left:
-(1-4a)-6a-(-16)=0
We add all the numbers together, and all the variables
-(-4a+1)-6a-(-16)=0
We add all the numbers together, and all the variables
-6a-(-4a+1)+16=0
We get rid of parentheses
-6a+4a-1+16=0
We add all the numbers together, and all the variables
-2a+15=0
We move all terms containing a to the left, all other terms to the right
-2a=-15
a=-15/-2
a=7+1/2
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