A community for students.
Here's the question you clicked on:
 0 viewing
dana.lindsey
 3 years ago
Solve, using linear combination.
3x + y = 4
2x + y = 4
(1, 7)
(0, 4)
(3, 12)
(3, 13)
dana.lindsey
 3 years ago
Solve, using linear combination. 3x + y = 4 2x + y = 4 (1, 7) (0, 4) (3, 12) (3, 13)

This Question is Closed

JayDS
 3 years ago
Best ResponseYou've already chosen the best response.1Well there are two options to use substitution method or elimination method, I'm sure you are aware of this.

JayDS
 3 years ago
Best ResponseYou've already chosen the best response.1I'll be using the substitution one in this case. 1) 3x + y = 4 I am going to rearrange to y =ax + b form y = 3x + 4 sub y = 3x + 4 into second equation 2x + y = 4 2x + (3x + 4) = 4 2x 3x + 4 = 4 x = 0 x = 0 sub x = 0 back into either equations to find y 2x + y = 4 2(0) + y = 4 0 + y = 4 y = 4 so (0,4) and the second answer.

dana.lindsey
 3 years ago
Best ResponseYou've already chosen the best response.0oooooo i get it now thank you :)

JayDS
 3 years ago
Best ResponseYou've already chosen the best response.1no problem :) and remember you can always check with these type of questions if you have got it correct or not by subbing back the x and y values you obtained into the equations.
Ask your own question
Sign UpFind more explanations on OpenStudy
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.