-21=-6/7x+9

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Solution for -21=-6/7x+9 equation: 



-21=-6/7x+9

We move all terms to the left:

-21-(-6/7x+9)=0



Domain of the equation: 7x+9)!=0

x∈R



We get rid of parentheses

6/7x-9-21=0

We multiply all the terms by the denominator


-9*7x-21*7x+6=0

Wy multiply elements

-63x-147x+6=0

We add all the numbers together, and all the variables

-210x+6=0

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

-210x=-6

x=-6/-210

x=1/35

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