42=40+2/a

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Solution for 42=40+2/a equation: 



42=40+2/a

We move all terms to the left:

42-(40+2/a)=0



Domain of the equation: a)!=0

a!=0/1

a!=0

a∈R



We add all the numbers together, and all the variables

-(2/a+40)+42=0

We get rid of parentheses

-2/a-40+42=0

We multiply all the terms by the denominator


-40*a+42*a-2=0

We add all the numbers together, and all the variables

2a-2=0

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

2a=2

a=2/2

a=1

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