4-2r=18

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Solution for 4-2r=18 equation: 



4-2r=18

We move all terms to the left:

4-2r-(18)=0

We add all the numbers together, and all the variables

-2r-14=0

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

-2r=14

r=14/-2

r=-7

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