Four points A (6, 3), B (-3, 5), C (4, -2) and D (x, 3x) are given in such a way that , find x.

Solution:

$ 24.5\text{ }=\text{ }28x-14 $

$ 28x\text{ }=\text{ }38.5 $

$ x\text{ }=\text{ }38.5/28 $

$ =\text{ }1.375 $