-1=-3(3r-8)-7

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Solution for -1=-3(3r-8)-7 equation:



-1=-3(3r-8)-7
We move all terms to the left:
-1-(-3(3r-8)-7)=0
We calculate terms in parentheses: -(-3(3r-8)-7), so:
-3(3r-8)-7
We multiply parentheses
-9r+24-7
We add all the numbers together, and all the variables
-9r+17
Back to the equation:
-(-9r+17)
We get rid of parentheses
9r-17-1=0
We add all the numbers together, and all the variables
9r-18=0
We move all terms containing r to the left, all other terms to the right
9r=18
r=18/9
r=2

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