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-1/5a+21=23
We move all terms to the left:
-1/5a+21-(23)=0
Domain of the equation: 5a!=0We add all the numbers together, and all the variables
a!=0/5
a!=0
a∈R
-1/5a-2=0
We multiply all the terms by the denominator
-2*5a-1=0
Wy multiply elements
-10a-1=0
We move all terms containing a to the left, all other terms to the right
-10a=1
a=1/-10
a=-1/10
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