-3r+8(8-r)=86

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Solution for -3r+8(8-r)=86 equation: 



-3r+8(8-r)=86

We move all terms to the left:

-3r+8(8-r)-(86)=0

We add all the numbers together, and all the variables

-3r+8(-1r+8)-86=0

We multiply parentheses

-3r-8r+64-86=0

We add all the numbers together, and all the variables

-11r-22=0

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

-11r=22

r=22/-11

r=-2

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