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-7(r+6)=-30-4r
We simplify the equation to the form, which is simple to understand
-7(r+6)=-30-4r
Reorder the terms in parentheses
+(-7r-42)=-30-4r
Remove unnecessary parentheses
-7r-42=-30-4r
We move all terms containing r to the left and all other terms to the right.
-7r+4r=-30+42
We simplify left and right side of the equation.
-3r=+12
We divide both sides of the equation by -3 to get r.
r=-4
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