-8=1/2r+9

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Solution for -8=1/2r+9 equation: 



-8=1/2r+9

We move all terms to the left:

-8-(1/2r+9)=0



Domain of the equation: 2r+9)!=0

r∈R



We get rid of parentheses

-1/2r-9-8=0

We multiply all the terms by the denominator


-9*2r-8*2r-1=0

Wy multiply elements

-18r-16r-1=0

We add all the numbers together, and all the variables

-34r-1=0

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

-34r=1

r=1/-34

r=-1/34

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