45+7r=80

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Solution for 45+7r=80 equation: 



45+7r=80

We move all terms to the left:

45+7r-(80)=0

We add all the numbers together, and all the variables

7r-35=0

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

7r=35

r=35/7

r=5

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