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7+a/5=-4
We move all terms to the left:
7+a/5-(-4)=0
We add all the numbers together, and all the variables
a/5+11=0
We multiply all the terms by the denominator
a+11*5=0
We add all the numbers together, and all the variables
a+55=0
We move all terms containing a to the left, all other terms to the right
a=-55
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