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-(4/5) = 0.75 // - 0.75
x-(4/5)-0.75 = 0
x-4/5-0.75 = 0
x-1.55 = 0 // + 1.55
x = 1.55
x = 1.55
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