-3.5r=18.9+7r

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Solution for -3.5r=18.9+7r equation: 



-3.5r=18.9+7r

We move all terms to the left:

-3.5r-(18.9+7r)=0

We add all the numbers together, and all the variables

-3.5r-(7r+18.9)=0

We get rid of parentheses

-3.5r-7r-18.9=0

We add all the numbers together, and all the variables

-10.5r-18.9=0

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

-10.5r=18.9

r=18.9/-10.5

r=-1+3.5/4.375

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