5r=(31+2r)-4

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Solution for 5r=(31+2r)-4 equation: 



5r=(31+2r)-4

We move all terms to the left:

5r-((31+2r)-4)=0

We add all the numbers together, and all the variables

5r-((2r+31)-4)=0



We calculate terms in parentheses: -((2r+31)-4), so:

(2r+31)-4

We get rid of parentheses

2r+31-4

We add all the numbers together, and all the variables

2r+27

Back to the equation:

-(2r+27)



We get rid of parentheses

5r-2r-27=0

We add all the numbers together, and all the variables

3r-27=0

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

3r=27

r=27/3

r=9

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