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-6+a/3=-10
We move all terms to the left:
-6+a/3-(-10)=0
We add all the numbers together, and all the variables
a/3+4=0
We multiply all the terms by the denominator
a+4*3=0
We add all the numbers together, and all the variables
a+12=0
We move all terms containing a to the left, all other terms to the right
a=-12
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