16=4-2r

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Solution for 16=4-2r equation: 



16=4-2r

We move all terms to the left:

16-(4-2r)=0

We add all the numbers together, and all the variables

-(-2r+4)+16=0

We get rid of parentheses

2r-4+16=0

We add all the numbers together, and all the variables

2r+12=0

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

2r=-12

r=-12/2

r=-6

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