Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing
TheForbiddenFollower
Group Title
solve my substitution (medal and fan)
x  y  z = 8
4x + 4y + 5z = 7
2x + 2z = 4
 11 months ago
 11 months ago
TheForbiddenFollower Group Title
solve my substitution (medal and fan) x  y  z = 8 4x + 4y + 5z = 7 2x + 2z = 4
 11 months ago
 11 months ago

This Question is Closed

texaschic101 Group TitleBest ResponseYou've already chosen the best response.1
2x + 2z = 4 2x = 2z + 4 x = z + 2 x  y  z = 8 (z + 2)  y  z = 8 z  2  y  z = 8 2  y = 8 y = 8 + 2 y = 6 y = 6 4x + 4y + 5z = 7 4(z + 2) + 4(6) + 5z = 7 4z  8 + 24 + 5z = 7 9z + 16 = 7 9z = 7  16 9z =  9 z = 1 x = z + 2 x = (1) + 2 x = 1 + 2 x = 3 lets check it now... x  y  z = 8 3  6 (1) = 8 9 + 1 = 8 8 = 8 (correct) check.. 4x + 4y + 5z = 7 4(3) + 4(6) + 5(1) = 7 12 + 24  5 = 7  17 + 24 = 7 7 = 7 (correct) your answer is : x = 3, y = 6, and z = 1 or (3,6,1)
 9 months ago
See more questions >>>
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.