-7=18-5r

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Solution for -7=18-5r equation: 



-7=18-5r

We move all terms to the left:

-7-(18-5r)=0

We add all the numbers together, and all the variables

-(-5r+18)-7=0

We get rid of parentheses

5r-18-7=0

We add all the numbers together, and all the variables

5r-25=0

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

5r=25

r=25/5

r=5

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