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25=(-3+5r)-3(r-4)
We simplify the equation to the form, which is simple to understand
25=(-3+5r)-3(r-4)
Remove unnecessary parentheses
25=-3+5r-3*(r-4)
Reorder the terms in parentheses
25=-3+5r+(-3r+12)
Remove unnecessary parentheses
+25=-3+5r-3r+12
We move all terms containing r to the left and all other terms to the right.
-5r+3r=-3+12-25
We simplify left and right side of the equation.
-2r=-16
We divide both sides of the equation by -2 to get r.
r=8
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