-2(8r+9)=21-6r

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Solution for -2(8r+9)=21-6r equation: 



-2(8r+9)=21-6r

We move all terms to the left:

-2(8r+9)-(21-6r)=0

We add all the numbers together, and all the variables

-2(8r+9)-(-6r+21)=0

We multiply parentheses

-16r-(-6r+21)-18=0

We get rid of parentheses

-16r+6r-21-18=0

We add all the numbers together, and all the variables

-10r-39=0

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

-10r=39

r=39/-10

r=-3+9/10

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