5r-4+7r=8r+16

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Solution for 5r-4+7r=8r+16 equation: 



5r-4+7r=8r+16

We move all terms to the left:

5r-4+7r-(8r+16)=0

We add all the numbers together, and all the variables

12r-(8r+16)-4=0

We get rid of parentheses

12r-8r-16-4=0

We add all the numbers together, and all the variables

4r-20=0

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

4r=20

r=20/4

r=5

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