86=-9r-4

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Solution for 86=-9r-4 equation: 



86=-9r-4

We move all terms to the left:

86-(-9r-4)=0

We get rid of parentheses

9r+4+86=0

We add all the numbers together, and all the variables

9r+90=0

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

9r=-90

r=-90/9

r=-10

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