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-a/4=-4
We move all terms to the left:
-a/4-(-4)=0
We add all the numbers together, and all the variables
-a/4+4=0
We multiply all the terms by the denominator
-a+4*4=0
We add all the numbers together, and all the variables
-1a+16=0
We move all terms containing a to the left, all other terms to the right
-a=-16
a=-16/-1
a=+16
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