3r+7(r-1)=143

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Solution for 3r+7(r-1)=143 equation: 



3r+7(r-1)=143

We move all terms to the left:

3r+7(r-1)-(143)=0

We multiply parentheses

3r+7r-7-143=0

We add all the numbers together, and all the variables

10r-150=0

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

10r=150

r=150/10

r=15

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