5=18-r

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Solution for 5=18-r equation: 



5=18-r

We move all terms to the left:

5-(18-r)=0

We add all the numbers together, and all the variables

-(-1r+18)+5=0

We get rid of parentheses

1r-18+5=0

We add all the numbers together, and all the variables

r-13=0

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

r=13

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