Question

*Urgent*

Use a matrix to find the solution to the system of equations.

X-5y = -5
-4x-2y = 20

A. (-5,-5)
B. (-5,0)
C. (0,5)
D. (-5,5)

Answer 1

B. (-5,0)

Explanation:

-2(X-5Y=-5) -5(-4X-2Y=20)

-2X-10Y=10 -subtract- 20X-10Y=-100 = -22X=110

_________

-22X

X=-5

Now substitute x with -5 to find Y which makes y=0