Question

by cross multiplication​

Answer 1

Answer:

x = 2 and y = 7/4

Step-by-step explanation:

a1=3,b1=4,c1=-10

a2=2,b2=-2,c2=-2

$x = \frac{b1c2 - b2c1}{a1b2 - a2b1}$

x= 4×-2 - (-2)×-10/3×-2- 2×4

= -8 -20/-6-8

= -28/-14 = 2

$y = \frac{c1a2 - c2a1}{a1b2 - a2b1}$

y= -10×2 - (-2)×3/3×-2-2×4

= -20+6/-6-8

= -14/-8 = 7/4