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/3 = 1/2.5 // - 1/2.5
x/3-(1/2.5) = 0
x/3-0.4 = 0
1/3*x-0.4 = 0 // + 0.4
1/3*x = 0.4 // : 1/3
x = 0.4/1/3
x = 1.20000001
x = 1.20000001
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