28=12+4r

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Solution for 28=12+4r equation:



28=12+4r
We move all terms to the left:
28-(12+4r)=0
We add all the numbers together, and all the variables
-(4r+12)+28=0
We get rid of parentheses
-4r-12+28=0
We add all the numbers together, and all the variables
-4r+16=0
We move all terms containing r to the left, all other terms to the right
-4r=-16
r=-16/-4
r=+4

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