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4+4r=-1+5r
We simplify the equation to the form, which is simple to understand
4+4r=-1+5r
We move all terms containing r to the left and all other terms to the right.
+4r-5r=-1-4
We simplify left and right side of the equation.
-1r=-5
We divide both sides of the equation by -1 to get r.
r=5
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