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11r+8(1-9r)=9r+8(-11-8)
We simplify the equation to the form, which is simple to understand
11r+8(1-9r)=9r+8(-11-8)
Simplifying terms in parentheses
11r+8*(1-9r)=9r+8*(-19)
Reorder the terms in parentheses
11r+(+8-72r)=9r+8*(-19)
Remove unnecessary parentheses
+11r+8-72r=+9r+8+*(-19+)
Reorder the terms in parentheses
11r+8-72r=9r+(-152)
Remove unnecessary parentheses
+11r+8-72r=+9r-152
We move all terms containing r to the left and all other terms to the right.
+11r-72r-9r=-152-8
We simplify left and right side of the equation.
-70r=-160
We divide both sides of the equation by -70 to get r.
r=2.28571428571
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