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*y)/3 // - (2*y)/3
x-((2*y)/3) = 0
x+(-2/3)*y = 0
x-2/3*y = 0 // + -2/3*y
x = -(-2/3*y)
x = 2/3*y
x = 2/3*y
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