Question

[x - 4y + 4z = 32
x - 5y = 20
r+4y = -16

Answer 1

y=-5.0666666

Explanation:

x-5y=20

x=5y+20

z+4y=-16

z=-4y-16

using the calculated values in the equation

x-4y+4z=32

(5y+20)-4y+4(-4y-16)=32

5y+20-4y-16y-64=32

-15y-44=32

-15y=76

y=76/-15

y=-5.0666666

use this value of y in equations x-5y=20 and z+4y=-16 to calculate the values of x and z