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2r+5+2r+4r-3+r=0
We simplify the equation to the form, which is simple to understand
2r+5+2r+4r-3+r=0
We move all terms containing r to the left and all other terms to the right.
+2r+2r+4r+1r=0-5+3
We simplify left and right side of the equation.
+9r=-2
We divide both sides of the equation by 9 to get r.
r=-0.22222222222222
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