-9=(3/4)x-21

Solution for -9=(3/4)x-21 equation:

-9=(3/4)x-21

We move all terms to the left:

-9-((3/4)x-21)=0


Domain of the equation: 4)x-21)!=0

x!=0/1

x!=0

x∈R


We add all the numbers together, and all the variables

-((+3/4)x-21)-9=0

We multiply all the terms by the denominator


-((+3-9*4)x-21)=0


We calculate terms in parentheses: -((+3-9*4)x-21), so:

(+3-9*4)x-21

We add all the numbers together, and all the variables

(-33)x-21

We multiply parentheses

-33x-21

Back to the equation:

-(-33x-21)


We get rid of parentheses

33x+21=0

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

33x=-21

x=-21/33

x=-7/11