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4500/a=30
We move all terms to the left:
4500/a-(30)=0
Domain of the equation: a!=0We multiply all the terms by the denominator
a∈R
-30*a+4500=0
We add all the numbers together, and all the variables
-30a+4500=0
We move all terms containing a to the left, all other terms to the right
-30a=-4500
a=-4500/-30
a=+150
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