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/3 = 1.5 // - 1.5
k/3-1.5 = 0
1/3*k-1.5 = 0 // + 1.5
1/3*k = 1.5 // : 1/3
k = 1.5/1/3
k = 4.50000005
k = 4.50000005
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