March 31, 2015

Homework Help: Algebra

Posted by Anneliese on Wednesday, February 25, 2009 at 2:39pm.

Solve the following system of linear equations:

2x - 3y + 6z = -12
5x + 2y - 8z = 29
7x + 6y + 4z = 49

First, I did elimination for the first two equations. I multiplied the first equation by two, and the second equation by 3.

4x - 6y + 12z = -24
15x + 6y - 24z = 87

That gets me:
19x - 12z = 63.

The next thing I have written down that the teacher told us is:

11x + 16z = 25

How did my teacher get to this point?

Answer this Question

First Name:
School Subject:

Related Questions

Algebra - To solve the following system of equations by elimination, which step...
algebra - 1 Solve the set of linear equations by the matrix method : a+3b+2c=3...
algebra - i need help with these problems (either a solution or how to plug them...
College Algebra - Please help! x-2y+z=7 2x+y-z=0 3x+2y-2z=-2 a. Solve the above ...
algebra 1 - Got a test tomorrow... Say you have a system of equations (linear), ...
Math - Solve the system of linear equations by elimination. Thank You for your ...
Algebra - Use the elimination method to solve the following system of equations...
Discrete Math - I am really stuck on these problems. I've worked a lot of them ...
Algebra - Solving system of linear equations by using the apropiate method name ...
algebra - Solve the system of equations by first writing it in matrix form and ...