20r=19r-7

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Solution for 20r=19r-7 equation: 



20r=19r-7

We move all terms to the left:

20r-(19r-7)=0

We get rid of parentheses

20r-19r+7=0

We add all the numbers together, and all the variables

r+7=0

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

r=-7

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