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/1.9 = -3.8 // + 3.8
x/1.9+3.8 = 0
0.52631579*x+3.8 = 0 // - 3.8
0.52631579*x = -3.8 // : 0.52631579
x = -3.8/0.52631579
x = -7.21999999
x = -7.21999999
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