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-4(5-7r)+7=31+6r
We simplify the equation to the form, which is simple to understand
-4(5-7r)+7=31+6r
Reorder the terms in parentheses
+(-20+28r)+7=31+6r
Remove unnecessary parentheses
-20+28r+7=+31+6r
We move all terms containing r to the left and all other terms to the right.
+28r-6r=+31+20-7
We simplify left and right side of the equation.
+22r=+44
We divide both sides of the equation by 22 to get r.
r=2
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