-4r=-66+7r

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Solution for -4r=-66+7r equation: 



-4r=-66+7r

We move all terms to the left:

-4r-(-66+7r)=0

We add all the numbers together, and all the variables

-4r-(7r-66)=0

We get rid of parentheses

-4r-7r+66=0

We add all the numbers together, and all the variables

-11r+66=0

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

-11r=-66

r=-66/-11

r=+6

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