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+2/3 = -13/3 // + -13/3
x+2/3-(-13/3) = 0
x+2/3+13/3 = 0
x+5 = 0 // - 5
x = -5
x = -5
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