If it's not what You are looking for type in the equation solver your own equation and let us solve it.
k in (-oo:+oo)
k/5.3 = 3.6 // - 3.6
k/5.3-3.6 = 0
0.18867925*k-3.6 = 0 // + 3.6
0.18867925*k = 3.6 // : 0.18867925
k = 3.6/0.18867925
k = 19.07999952
k = 19.07999952
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