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-11=-4+a/2
We move all terms to the left:
-11-(-4+a/2)=0
We add all the numbers together, and all the variables
-(a/2-4)-11=0
We get rid of parentheses
-a/2+4-11=0
We multiply all the terms by the denominator
-a+4*2-11*2=0
We add all the numbers together, and all the variables
-1a-14=0
We move all terms containing a to the left, all other terms to the right
-a=14
a=14/-1
a=-14
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