-9r-12(r-1)=-10(2r-2)-8

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Solution for -9r-12(r-1)=-10(2r-2)-8 equation:



-9r-12(r-1)=-10(2r-2)-8
We move all terms to the left:
-9r-12(r-1)-(-10(2r-2)-8)=0
We multiply parentheses
-9r-12r-(-10(2r-2)-8)+12=0
We calculate terms in parentheses: -(-10(2r-2)-8), so:
-10(2r-2)-8
We multiply parentheses
-20r+20-8
We add all the numbers together, and all the variables
-20r+12
Back to the equation:
-(-20r+12)
We add all the numbers together, and all the variables
-21r-(-20r+12)+12=0
We get rid of parentheses
-21r+20r-12+12=0
We add all the numbers together, and all the variables
-r=0
r=0/-1
r=0

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