2r-5r=42

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Solution for 2r-5r=42 equation: 



2r-5r=42

We move all terms to the left:

2r-5r-(42)=0

We add all the numbers together, and all the variables

-3r-42=0

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

-3r=42

r=42/-3

r=-14

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