If it's not what You are looking for type in the equation solver your own equation and let us solve it.
r in (-oo:+oo)
(5/6)*r = 1.75 // - 1.75
(5/6)*r-1.75 = 0
5/6*r-1.75 = 0 // + 1.75
5/6*r = 1.75 // : 5/6
r = 1.75/5/6
r = 2.10000001
r = 2.10000001
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