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-13r-35=-70-4r
We simplify the equation to the form, which is simple to understand
-13r-35=-70-4r
We move all terms containing r to the left and all other terms to the right.
-13r+4r=-70+35
We simplify left and right side of the equation.
-9r=-35
We divide both sides of the equation by -9 to get r.
r=3.88888888889
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