3r+126=7r-70

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Solution for 3r+126=7r-70 equation: 



3r+126=7r-70

We move all terms to the left:

3r+126-(7r-70)=0

We get rid of parentheses

3r-7r+70+126=0

We add all the numbers together, and all the variables

-4r+196=0

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

-4r=-196

r=-196/-4

r=+49

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