Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing
krissywatts
Group Title
solve system of equation:
x+y=1
yz=4
2x+y+5z=38
i need step by step help please?
 one year ago
 one year ago
krissywatts Group Title
solve system of equation: x+y=1 yz=4 2x+y+5z=38 i need step by step help please?
 one year ago
 one year ago

This Question is Closed

campbell_st Group TitleBest ResponseYou've already chosen the best response.1
ok... take the 2nd equation y  z = 4 and multiply it by 5 so you get 5y  5z = 20 now add it to the last equation this will eliminate z 5y  5z = 20 2x + y + 5z = 38  2x + 6y = 18 now you have 2 equations in 2 unknowns... which is easier to solve you can divide the equation by 2 to make easier x + 3y = 9 and x + y = 1 a little subtraction x + 3y = 9 x  y = 1  2y = 8 so y = 4 substitute the value of y into the 1st equation to find x x  4 = 1 when you have x substitute your value of y into the 2nd equation to find z 4  z = 4 hope this helps
 one year ago

krissywatts Group TitleBest ResponseYou've already chosen the best response.0
okay thanks
 one year ago

krissywatts Group TitleBest ResponseYou've already chosen the best response.0
and z is equal t0 7 corretc?
 one year ago

krissywatts Group TitleBest ResponseYou've already chosen the best response.0
@campbell_st
 one year ago

campbell_st Group TitleBest ResponseYou've already chosen the best response.1
no I think z = 8
 one year ago

krissywatts Group TitleBest ResponseYou've already chosen the best response.0
and x is 3 correct?
 one year ago

campbell_st Group TitleBest ResponseYou've already chosen the best response.1
yep... I think thats it
 one year ago

krissywatts Group TitleBest ResponseYou've already chosen the best response.0
thank yo so much. You work fast :)
 one year 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.