7r+8=4r=-13

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Solution for 7r+8=4r=-13 equation: 



7r+8=4r=-13

We move all terms to the left:

7r+8-(4r)=0

We add all the numbers together, and all the variables

3r+8=0

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

3r=-8

r=-8/3

r=-2+2/3

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