Mark M. answered • 05/23/17
Tutor
5.0
(278)
Mathematics Teacher - NCLB Highly Qualified
x + y + z = 5
x - y + z = 1
x - z = y + 3
Can you solve the system?
Mark M.
x + y + z = 5
x - y + z = 1
x - z = y + 3
x - y + z = 1
x - z = y + 3
x + y + z = 5
x - y + z = 1
x - y - z = 3 arrange
x - y + z = 1
x - y - z = 3 arrange
2x + 2z = 6 add first and second
2x = 4 add second and third
x = 2
4 + 2z = 6
2z = 2 substitute
z = 1
Can you determine y?
Report
05/24/17
VICTORIA S.
05/23/17