Question

Solve the following system of equations using substitution:

2x - 2y + z = 8
-y+z=4
2z=4​

Answer 1

Explanation:

2z = 4

z = 2

-y + 2 = 4

-y = 2

y = -2

2x + 4 + 2 = 8

2x + 6 = 8

2x = 2

x = 1

(1, -2, 2)