18r+4=129-7r

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Solution for 18r+4=129-7r equation: 



18r+4=129-7r

We move all terms to the left:

18r+4-(129-7r)=0

We add all the numbers together, and all the variables

18r-(-7r+129)+4=0

We get rid of parentheses

18r+7r-129+4=0

We add all the numbers together, and all the variables

25r-125=0

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

25r=125

r=125/25

r=5

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