8r-4=-8+7r

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



8r-4=-8+7r

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

8r-7r+8-4=0

We add all the numbers together, and all the variables

r+4=0

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

r=-4

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