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/2-2.01 = 1.9 // - 1.9
x/2-2.01-1.9 = 0
1/2*x-3.91 = 0 // + 3.91
1/2*x = 3.91 // : 1/2
x = 3.91/1/2
x = 7.82
x = 7.82
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