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8r+2r-5r--19r+4r=16
We simplify the equation to the form, which is simple to understand
8r+2r-5r+19r+4r=16
We move all terms containing r to the left and all other terms to the right.
+8r+2r-5r+19r+4r=+16
We simplify left and right side of the equation.
+28r=+16
We divide both sides of the equation by 28 to get r.
r=0.57142857142857
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