2+8r=3r-7+4

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Solution for 2+8r=3r-7+4 equation: 



2+8r=3r-7+4

We move all terms to the left:

2+8r-(3r-7+4)=0

We add all the numbers together, and all the variables

8r-(3r-3)+2=0

We get rid of parentheses

8r-3r+3+2=0

We add all the numbers together, and all the variables

5r+5=0

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

5r=-5

r=-5/5

r=-1

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