Tuesday

September 16, 2014

September 16, 2014

Posted by **Rebecca** on Thursday, August 2, 2007 at 10:47pm.

3x + y - z = 1

x + 2y - z = 0

2x - y + z = 4

I used to be able to do these but now I'm getting a little rusty. Thanks for the help!

Get two independent equations in x and y only by

(1) adding the last two equations

(2) subracting equation 2 from equation 1

Here's what you get

(a) 3x +y = 4

(b) 2x -y = 1

Add those two to get rid of y and you will can easily solve for x. It equals 1. Take it from there.

I have no idea what ROWOPS means

ROWOPS is apparently a fancy new-math name for what I just did in my previous answer. It involve Operations on Rows (equations).

**Answer this Question**

**Related Questions**

College Algebra - Solve the system of equations. Then classify the system. 7x-7y...

Algebra II - What is the first step for solving this system by substitution? DO ...

College Algebra - Solve the system of equations using matrices. If system has no...

Algebra 2 - 1.) Write a system of equations that has NO solution. 2.) If you ...

Algebra 2 - 1.) Write a system of equations that has NO solution. 2.) If you ...

Algebra 2 - 1.) Write a system of equations that has NO solution. 2.) If you ...

Algebra 2 - 1. What is the first step for solving this system by substitution? ...

algebra - solve the system of equations by graphing. Then classify the system as...

algebra 1 - at a certain high school,350 students are taking algebra. the ratio ...

Math 116 - Consider the following system of equations. y=2x-2 y-2x=9 What can ...