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-2(2r+3)+12=-(3r-10)
We simplify the equation to the form, which is simple to understand
-2(2r+3)+12=-(3r-10)
Reorder the terms in parentheses
+(-4r-6)+12=-(3r-10)
Remove unnecessary parentheses
-4r-6+12=-(+3r-10+)
Remove unnecessary parentheses
-4r-6+12=-3r+10
We move all terms containing r to the left and all other terms to the right.
-4r+3r=+10+6-12
We simplify left and right side of the equation.
-1r=+4
We divide both sides of the equation by -1 to get r.
r=-4
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