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r/(-2)+11=15
We simplify the equation to the form, which is simple to understand
r/(-2)+11=15
Reorder the terms in parentheses
+(-0.5r)+11=15
Remove unnecessary parentheses
-0.5r+11=+15
We move all terms containing r to the left and all other terms to the right.
-0.5r=+15-11
We simplify left and right side of the equation.
-0.5r=+4
We divide both sides of the equation by -0.5 to get r.
r=-8
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