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2 (4r+6) =0.6666666667 (12r+18)
We simplify the equation to the form, which is simple to understand
2(4r+6)=0.6666666667(12r+18)
Reorder the terms in parentheses
+(+8r+12)=0.6666666667*(12r+18)
Remove unnecessary parentheses
+8r+12=0.6666666667+*(+12r+18+)
Reorder the terms in parentheses
+8r+12=+(+8.0000000004r+12.0000000006)
Remove unnecessary parentheses
+8r+12=+8.0000000004r+12.0000000006
We move all terms containing r to the left and all other terms to the right.
+8r-8.0000000004r=+12.0000000006-12
We simplify left and right side of the equation.
-4.00000033096E-10r=+6.00000049644E-10
We divide both sides of the equation by -4.00000033096E-10 to get r.
r=-1.5
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