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r+2=-2(r+2)-3
We simplify the equation to the form, which is simple to understand
r+2=-2(r+2)-3
Reorder the terms in parentheses
r+2=+(-2r-4)-3
Remove unnecessary parentheses
+r+2=-2r-4-3
We move all terms containing r to the left and all other terms to the right.
+1r+2r=-4-3-2
We simplify left and right side of the equation.
+3r=-9
We divide both sides of the equation by 3 to get r.
r=-3
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