MATH SOLVE

4 months ago

Q:
# What is the solution to the system? 1) 3x+y+z=7 2) x+3y-z=13 3) y=2x-1A) (3, 2, −2)B)(7, 13, −1)C) (−2, 3, 2)D)(2, 3, −2)

Accepted Solution

A:

Answer:D) (2, 3, -2)Step-by-step explanation:For a question like this, it is often easiest just to check the answers to see which works. The easiest equation to use for that purpose is the one that has only two variables: y = 2x-1. Only selections B and D are successful in that equation. Selection B doesn't work in equation (2), leaving answer D as the best choice.