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 = -1.3/5 // + -1.3/5
x-(-1.3/5) = 0
x+0.26 = 0
x+0.26 = 0 // - 0.26
x = -0.26
x = -0.26
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