r/9=-10

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Solution for r/9=-10 equation: 



r/9=-10

We move all terms to the left:

r/9-(-10)=0

We add all the numbers together, and all the variables

r/9+10=0

We multiply all the terms by the denominator


r+10*9=0

We add all the numbers together, and all the variables

r+90=0

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

r=-90

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