-4.2+6/7a=8.9

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Solution for -4.2+6/7a=8.9 equation: 



-4.2+6/7a=8.9

We move all terms to the left:

-4.2+6/7a-(8.9)=0



Domain of the equation: 7a!=0

a!=0/7

a!=0

a∈R



We add all the numbers together, and all the variables

6/7a-13.1=0

We multiply all the terms by the denominator


-(13.1)*7a+6=0

We multiply parentheses

-91.7a+6=0

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

-91.7a=-6

a=-6/-91.7

a=6/91.7

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