-7+4r=-15.

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Solution for -7+4r=-15. equation: 



-7+4r=-15.

We move all terms to the left:

-7+4r-(-15.)=0

We add all the numbers together, and all the variables

4r-7-(-15)=0

We add all the numbers together, and all the variables

4r+8=0

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

4r=-8

r=-8/4

r=-2

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