-r+7=-8+4r

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Solution for -r+7=-8+4r equation: 



-r+7=-8+4r

We move all terms to the left:

-r+7-(-8+4r)=0

We add all the numbers together, and all the variables

-r-(4r-8)+7=0

We add all the numbers together, and all the variables

-1r-(4r-8)+7=0

We get rid of parentheses

-1r-4r+8+7=0

We add all the numbers together, and all the variables

-5r+15=0

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

-5r=-15

r=-15/-5

r=+3

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