7r+5=45-r

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Solution for 7r+5=45-r equation: 



7r+5=45-r

We move all terms to the left:

7r+5-(45-r)=0

We add all the numbers together, and all the variables

7r-(-1r+45)+5=0

We get rid of parentheses

7r+1r-45+5=0

We add all the numbers together, and all the variables

8r-40=0

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

8r=40

r=40/8

r=5

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