Question

A point with an ordinate –1.3 belongs to the graph of the equation x – xy = 46. Find the abscissa of this point.

Answer 1

The coordinates of any point P are represented by (x, y).
 The first coordinate is called the abscissa of the point or the x coordinate of the point.
 The second coordinate is called the ordinate of the point or coordinate y of the point.
 We have then:
 x - xy = 46
 Clearing x we have:
 x (1-y) = 46
 x = 46 / (1-y)
 Substituting values:
 x = 46 / (1 - (- 1.3))
 x = 20
 Answer:
 The abscissa of this point is:
 x = 20