5+9(1+7r)=21

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Solution for 5+9(1+7r)=21 equation: 



5+9(1+7r)=21

We move all terms to the left:

5+9(1+7r)-(21)=0

We add all the numbers together, and all the variables

9(7r+1)+5-21=0

We add all the numbers together, and all the variables

9(7r+1)-16=0

We multiply parentheses

63r+9-16=0

We add all the numbers together, and all the variables

63r-7=0

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

63r=7

r=7/63

r=1/9

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