1.6r+2=18

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Solution for 1.6r+2=18 equation: 



1.6r+2=18

We move all terms to the left:

1.6r+2-(18)=0

We add all the numbers together, and all the variables

1.6r-16=0

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

1.6r=16

r=16/1.6

r=10

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