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a/19=-2
We move all terms to the left:
a/19-(-2)=0
We add all the numbers together, and all the variables
a/19+2=0
We multiply all the terms by the denominator
a+2*19=0
We add all the numbers together, and all the variables
a+38=0
We move all terms containing a to the left, all other terms to the right
a=-38
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