10.5=-9r

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Solution for 10.5=-9r equation: 



10.5=-9r

We move all terms to the left:

10.5-(-9r)=0

We get rid of parentheses

9r+10.5=0

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

9r=-10.5

r=-10.5/9

r=-1+1/6

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