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6-7r-5-3r=0
We simplify the equation to the form, which is simple to understand
6-7r-5-3r=0
We move all terms containing r to the left and all other terms to the right.
-7r-3r=0-6+5
We simplify left and right side of the equation.
-10r=-1
We divide both sides of the equation by -10 to get r.
r=0.1
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