-18+7r=45

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Solution for -18+7r=45 equation: 



-18+7r=45

We move all terms to the left:

-18+7r-(45)=0

We add all the numbers together, and all the variables

7r-63=0

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

7r=63

r=63/7

r=9

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