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3.5r=(4+.5r)
We simplify the equation to the form, which is simple to understand
3.5r=(4+.5r)
Remove unnecessary parentheses
3.5r=4+.5r
We move all terms containing r to the left and all other terms to the right.
+3.5r-0.5r=+4
We simplify left and right side of the equation.
+3r=+4
We divide both sides of the equation by 3 to get r.
r=1.3333333333333
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