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-r+5(r+2)=-10
We simplify the equation to the form, which is simple to understand
-r+5(r+2)=-10
Reorder the terms in parentheses
-r+(+5r+10)=-10
Remove unnecessary parentheses
-r+5r+10=-10
We move all terms containing r to the left and all other terms to the right.
-1r+5r=-10-10
We simplify left and right side of the equation.
+4r=-20
We divide both sides of the equation by 4 to get r.
r=-5
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