If it's not what You are looking for type in the equation solver your own equation and let us solve it.
X in (-oo:+oo)
X/4.1 = 1.9 // - 1.9
X/4.1-1.9 = 0
0.24390244*X-1.9 = 0 // + 1.9
0.24390244*X = 1.9 // : 0.24390244
X = 1.9/0.24390244
X = 7.78999997
X = 7.78999997
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