-3r+12-9r+8=-3(4r+7)

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Solution for -3r+12-9r+8=-3(4r+7) equation: 



-3r+12-9r+8=-3(4r+7)

We move all terms to the left:

-3r+12-9r+8-(-3(4r+7))=0

We add all the numbers together, and all the variables

-12r-(-3(4r+7))+20=0



We calculate terms in parentheses: -(-3(4r+7)), so:

-3(4r+7)

We multiply parentheses

-12r-21

Back to the equation:

-(-12r-21)



We get rid of parentheses

-12r+12r+21+20=0

We add all the numbers together, and all the variables

41!=0

There is no solution for this equation

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