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 second equation.

Answer 1

2x + 5y – 2z = –1
x + 3y + z = –2
3x – 2y + 3z = –17

Answer 2

choices are: –y – 4z = 3
–11y = –11

11y = 3
7y + 6z = –11

4x + 11y = –5
–11y = –11

–y = –5
6x + 7y = –11

Answer 3

i think it's the fourth choice, am i right?