-3(5+7r)+6r=-120

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Solution for -3(5+7r)+6r=-120 equation: 



-3(5+7r)+6r=-120

We move all terms to the left:

-3(5+7r)+6r-(-120)=0

We add all the numbers together, and all the variables

-3(7r+5)+6r-(-120)=0

We add all the numbers together, and all the variables

6r-3(7r+5)+120=0

We multiply parentheses

6r-21r-15+120=0

We add all the numbers together, and all the variables

-15r+105=0

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

-15r=-105

r=-105/-15

r=+7

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