1-2r=3

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Solution for 1-2r=3 equation: 



1-2r=3

We move all terms to the left:

1-2r-(3)=0

We add all the numbers together, and all the variables

-2r-2=0

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

-2r=2

r=2/-2

r=-1

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