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-2(4-r)-5=11
We simplify the equation to the form, which is simple to understand
-2(4-r)-5=11
Reorder the terms in parentheses
+(-8+2r)-5=11
Remove unnecessary parentheses
-8+2r-5=+11
We move all terms containing r to the left and all other terms to the right.
+2r=+11+8+5
We simplify left and right side of the equation.
+2r=+24
We divide both sides of the equation by 2 to get r.
r=12
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