10(r-9)=-90+19r

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Solution for 10(r-9)=-90+19r equation: 



10(r-9)=-90+19r

We move all terms to the left:

10(r-9)-(-90+19r)=0

We add all the numbers together, and all the variables

10(r-9)-(19r-90)=0

We multiply parentheses

10r-(19r-90)-90=0

We get rid of parentheses

10r-19r+90-90=0

We add all the numbers together, and all the variables

-9r=0

r=0/-9

r=0

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