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-2r+9=-5+58
We simplify the equation to the form, which is simple to understand
-2r+9=-5+58
We move all terms containing r to the left and all other terms to the right.
-2r=-5+58-9
We simplify left and right side of the equation.
-2r=+44
We divide both sides of the equation by -2 to get r.
r=-22
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