Quantcast

A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous551

  • 2 years ago

SIMPLE QUESTION: Solve. Do checks. Explain. x + 4y = 2 -x + y = 8 Systems Of Elimination/Addition (I'm a visual learner)

  • This Question is Closed
  1. mathmate
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Add the equations to eliminate x. Solve for y. Back substitute to solve for x. Hint for check: x*y = -12

  2. texaschic101
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Here you go " visual learner " x + 4y = 2 -x + y = 8 -----------add 0 + 5y = 10 (as you can see, the x's canceled each other out) 5y = 10 (divide by 5 to get y by itself) 5y/5 = 10/5 y = 2 Now sub 2 in for y in either of the original equations x + 4y = 2 x + 4(2) = 2 x + 8 = 2 (subtract 8 from each side to get x by itself) x + 8 - 8 = 2 - 8 x = - 6 check.....you can use any of the original equations. Now just sub 2 in for y and -6 in for x. - x + y = 8 -(-6) + 2 = 8 6 + 2 = 8 8 = 8 (correct) ANSWER : x = -6 and y = 2

  3. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

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
  • 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.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.