Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

wolfgirl

  • 4 years ago

Use the elimination method to solve the following system of equations. x + 3y – z = 2 x – 2y + 3z = 7 x + 2y – 5z = –21

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

    well here, x + 3y – z=–21........................1 2 x – 2y + 3z=-21,,,,,,,,,,,,,,,,,,,,,,,2 7 x + 2y – 5z=-21 ..........................3 now multiply eqn 1 by 2 2x+6y-2z=-42.........................4 subtrating 2-4 -8y+5z=21..............................5 multiply eqn 1 by 7 7x+21y-7z=-147........................7 subtrating 3 - 6 -19y+2z=126.............................8 z=(19y+126)/2.........................9 substituting value of z in 5 -8y+{5(19y+126)/2}=21................................... now get value of y substitute the value of y in eqn 5 get value of z substitute value of y and z in 1 get value of x ............................gud luck

  2. 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