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-9(-3-5)=2(-4-r)
We simplify the equation to the form, which is simple to understand
-9(-3-5)=2(-4-r)
Simplifying terms in parentheses
-9*(-8)=2*(-4-r)
Reorder the terms in parentheses
+(+72)=2*(-4-r)
Remove unnecessary parentheses
+72=+2+*(-4-r+)
Reorder the terms in parentheses
+72=+(-8-2r)
Remove unnecessary parentheses
+72=-8-2r
We move all terms containing r to the left and all other terms to the right.
+2r=-8-72
We simplify left and right side of the equation.
+2r=-80
We divide both sides of the equation by 02 to get r.
r=-40
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