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3*r=20/25
We simplify the equation to the form, which is simple to understand
3*r=20/25
We move all terms containing r to the left and all other terms to the right.
+3r=0.8
We simplify left and right side of the equation.
+3r=0.8
We divide both sides of the equation by 3 to get r.
r=0.26666666666667
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