21r+22-56=312+32-7r

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Solution for 21r+22-56=312+32-7r equation: 



21r+22-56=312+32-7r

We move all terms to the left:

21r+22-56-(312+32-7r)=0

We add all the numbers together, and all the variables

21r-(-7r+344)+22-56=0

We add all the numbers together, and all the variables

21r-(-7r+344)-34=0

We get rid of parentheses

21r+7r-344-34=0

We add all the numbers together, and all the variables

28r-378=0

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

28r=378

r=378/28

r=13+1/2

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