For example., Lets say y = x + 1 is equation 1. So here, when x = 4 , y = 5 . Also, y = 1.25 x , is equation 2 Here also, when x = 4 , y = 5 , But these equations give different results when y = 18 For equation 1, 18 = x + 1
So, x = 17 For equation 2, 18 = 1.25 x 18 1.25 = x So, x = 14.4