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r+6/7-1=-138/35
We simplify the equation to the form, which is simple to understand
r+6/7-1=-138/35
We move all terms containing r to the left and all other terms to the right.
+1r=-3.9428571428571-0.85714285714286+1
We simplify left and right side of the equation.
+1r=-3.8
We divide both sides of the equation by 1 to get r.
r=-3.8
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