1/a+2/a=7

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Solution for 1/a+2/a=7 equation: 



1/a+2/a=7

We move all terms to the left:

1/a+2/a-(7)=0



Domain of the equation: a!=0

a∈R



We multiply all the terms by the denominator


-7*a+1+2=0

We add all the numbers together, and all the variables

-7a+3=0

We move all terms containing a to the left, all other terms to the right

-7a=-3

a=-3/-7

a=3/7

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