Solve for u x y and z in the given matrix equation x 7 8 y

Solve for u, x, y, and z in the given matrix equation.

+

=

	x	7
8	y

Solution

x - 4 = 2 => x = 6

-7 + z = -7 => z = 0

8 + 6 = 2u => u = 7

y + 4 = 8 => y = 4