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 = (7/3)*y // - (7/3)*y
x-((7/3)*y) = 0
x+(-7/3)*y = 0
x-7/3*y = 0 // + -7/3*y
x = -(-7/3*y)
x = 7/3*y
x = 7/3*y
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