7+8=2r+3

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



7+8=2r+3

We move all terms to the left:

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

We add all the numbers together, and all the variables

-(2r+3)+15=0

We get rid of parentheses

-2r-3+15=0

We add all the numbers together, and all the variables

-2r+12=0

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

-2r=-12

r=-12/-2

r=+6

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