Question

If you were to use the substitution method to solve the following system, choose the new system of equations that would result if x was isolated in the third equation.

2x – 3y + z = –4
2x – 2y + z = –1
x – 2y + 3z = –6

A. 5x + 7y = 6
y – 4 = –1

B. –y – 1 = –4
–5x + 4y = –3

C. y – 5z = 8
2y – 5z = 11

D.–7y + 7z = 8
–6y + 7z = 11