5+3r=7r-15

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Solution for 5+3r=7r-15 equation: 



5+3r=7r-15

We move all terms to the left:

5+3r-(7r-15)=0

We get rid of parentheses

3r-7r+15+5=0

We add all the numbers together, and all the variables

-4r+20=0

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

-4r=-20

r=-20/-4

r=+5

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