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-4(4+r)=12+3r
We simplify the equation to the form, which is simple to understand
-4(4+r)=12+3r
Reorder the terms in parentheses
+(-16-4r)=12+3r
Remove unnecessary parentheses
-16-4r=+12+3r
We move all terms containing r to the left and all other terms to the right.
-4r-3r=+12+16
We simplify left and right side of the equation.
-7r=+28
We divide both sides of the equation by -7 to get r.
r=-4
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