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5 (7r+6)+4 (2r+4)=-40
We simplify the equation to the form, which is simple to understand
5(7r+6)+4(2r+4)=-40
Reorder the terms in parentheses
+(+35r+30)+4*(2r+4)=-40
Remove unnecessary parentheses
+35r+30+4+*(+2r+4+)=-40
Reorder the terms in parentheses
+35r+30+(+8r+16)=-40
Remove unnecessary parentheses
+35r+30+8r+16=-40
We move all terms containing r to the left and all other terms to the right.
+35r+8r=-40-30-16
We simplify left and right side of the equation.
+43r=-86
We divide both sides of the equation by 43 to get r.
r=-2
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