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-5(2r+6)+5(4r+6)=4r-7r
We simplify the equation to the form, which is simple to understand
-5(2r+6)+5(4r+6)=4r-7r
Reorder the terms in parentheses
+(-10r-30)+5*(4r+6)=4r-7r
Remove unnecessary parentheses
-10r-30+5+*(+4r+6+)=+4r-7r
Reorder the terms in parentheses
-10r-30+(+20r+30)=4r-7r
Remove unnecessary parentheses
-10r-30+20r+30=+4r-7r
We move all terms containing r to the left and all other terms to the right.
-10r+20r-4r+7r=+30-30
We simplify left and right side of the equation.
+13r=0
We divide both sides of the equation by 13 to get r.
r=0
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