18+2r=74

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Solution for 18+2r=74 equation: 



18+2r=74

We move all terms to the left:

18+2r-(74)=0

We add all the numbers together, and all the variables

2r-56=0

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

2r=56

r=56/2

r=28

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