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-5/a=75
We move all terms to the left:
-5/a-(75)=0
Domain of the equation: a!=0We multiply all the terms by the denominator
a∈R
-75*a-5=0
We add all the numbers together, and all the variables
-75a-5=0
We move all terms containing a to the left, all other terms to the right
-75a=5
a=5/-75
a=-1/15
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