3/a-4=21/a+1

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Solution for 3/a-4=21/a+1 equation:



3/a-4=21/a+1
We move all terms to the left:
3/a-4-(21/a+1)=0
Domain of the equation: a!=0
a∈R
Domain of the equation: a+1)!=0
a∈R
We get rid of parentheses
3/a-21/a-1-4=0
We multiply all the terms by the denominator
-1*a-4*a+3-21=0
We add all the numbers together, and all the variables
-5a-18=0
We move all terms containing a to the left, all other terms to the right
-5a=18
a=18/-5
a=-3+3/5

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