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 = -((5/2)*y+75) // + (5/2)*y+75
x+(5/2)*y+75 = 0
x+5/2*y+75 = 0 // - 5/2*y+75
x = -(5/2*y+75)
x = -(5/2*y+75)
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