How do you solve the system of linear equations # 2x + y = 9# and # x - y = 3#?
1 Answer
Feb 17, 2016
Explanation:
Given:
[1]
[2]
Add equations [1] and [2] to get
[3]
Divide equation [3] by
[4]
Substitute
[5]
Think about it for a minute, then write
[6]