19=12+r/4

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Solution for 19=12+r/4 equation: 



19=12+r/4

We move all terms to the left:

19-(12+r/4)=0

We add all the numbers together, and all the variables

-(r/4+12)+19=0

We get rid of parentheses

-r/4-12+19=0

We multiply all the terms by the denominator


-r-12*4+19*4=0

We add all the numbers together, and all the variables

-1r+28=0

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

-r=-28

r=-28/-1

r=+28

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