Solve 3x-y+2z=4 - Help for Newbie

Click For Summary

Homework Help Overview

The discussion revolves around solving a system of equations involving three variables: x, y, and z. The original poster seeks assistance with the equation 3x - y + 2z = 4, expressing a need for guidance as a newcomer to the subject.

Discussion Character

  • Exploratory, Problem interpretation, Assumption checking

Approaches and Questions Raised

  • Participants discuss the nature of the problem, noting that there is one equation with three unknowns, which implies the need for additional information or assumptions to find specific solutions. Some suggest methods such as converting to a matrix equation or modifying equations to solve them simultaneously. Others inquire about forming matrix equations and manipulating the given equations.

Discussion Status

The conversation is ongoing, with participants exploring various methods to approach the problem. Some have offered potential strategies for solving the equations, while others express difficulty in understanding the mathematical language used. There is no explicit consensus on a single method, but multiple avenues are being considered.

Contextual Notes

Participants highlight the challenge of interpreting mathematical concepts in English, indicating a barrier to understanding the problem fully. There is also a focus on the need for clarity in forming and manipulating equations.

poon
Messages
3
Reaction score
0
am not a math guru :P,am a newbie even if this should be solved by a newbie as well, Id like u guys to help me out to solve this one :

3x-y+2z=4

Im really needing this, thank you all.
 
Physics news on Phys.org
One equation, three unknowns.

You can solve this equation as long as you pick values for any two of the unknowns.
 
SteamKing said:
One equation, three unknowns.

You can solve this equation as long as you pick values for any two of the unknowns.

can u give me a hand now ? :)
3x+y+2z=4
2x+3y-z=4
2x-y-z=0
 
You could either convert it into a matrix equation and solve it.

Or you can use one equation to modify the other two, and then solve those two simultaneously. For example if you take the last equation and substitute it into the first 2, then solve the now modified first two you will get two of the solutions.
 
Thank you guys. But when its up to math in english I am not good,actually I am not understanding this that much, i need someone to solve it in mathematical view..
 
poon said:
Thank you guys. But when its up to math in english I am not good,actually I am not understanding this that much, i need someone to solve it in mathematical view..

Do you know how to form a matrix equation from a system of equations?

3x+y+2z=4 (1)
2x+3y-z=4 (2)
2x-y-z=0 (3)

If you take equation 2 and subtract that from equation 3, what equation are you left with?

Similarly, if you take equation 1 and add that to 2*equation 3, what equation are you left with?
 

Similar threads

Solving x+3y=4-kz & 4x-2y=5+10z: Find the Solution Here
  • · Replies 6 ·
Replies
6
Views
2K
Problem solving this volume using Jacobi's Determinant
  • · Replies 1 ·
Replies
1
Views
2K
Does it matter in which order I assign the values?
  • · Replies 11 ·
Replies
11
Views
2K
Induction Proof, Apostol Calc Vol I, I.4.4.7
  • · Replies 6 ·
Replies
6
Views
2K
Inverse of a multivariate function
  • · Replies 12 ·
Replies
12
Views
4K
Solving a system with the inverse of a matrix.
  • · Replies 4 ·
Replies
4
Views
2K
Solve Diff. Eq.: Dy/Dx + 1 + y + x=(x+y)^2 e^(3x)
  • · Replies 11 ·
Replies
11
Views
2K
How Can You Simplify the Taylor Series Calculation for cos(3x^2)?
  • · Replies 1 ·
Replies
1
Views
4K
Solving a system of differential equations
  • · Replies 12 ·
Replies
12
Views
2K
Why Is My Integration of the Region Between y=2x and y=x^2+3x-6 Incorrect?
  • · Replies 6 ·
Replies
6
Views
2K