108=3(-6-7r)

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Solution for 108=3(-6-7r) equation:



108=3(-6-7r)
We move all terms to the left:
108-(3(-6-7r))=0
We add all the numbers together, and all the variables
-(3(-7r-6))+108=0
We calculate terms in parentheses: -(3(-7r-6)), so:
3(-7r-6)
We multiply parentheses
-21r-18
Back to the equation:
-(-21r-18)
We get rid of parentheses
21r+18+108=0
We add all the numbers together, and all the variables
21r+126=0
We move all terms containing r to the left, all other terms to the right
21r=-126
r=-126/21
r=-6

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