Question 1042291

Your are going to solve a 3-by-3 system of equations. You will be guided through it step-by- step, as this is a bit of an advanced problem. 
Equation 1: x + y + z = 2 
Equation 2: x + y - z = -2 
Equation 3: 2x - y + z = 5

Step 1: Combine equation 1 and 2 to get an equation only in x and y. Call this equation 4. 
Step 2: Combine equation 1 and 3 to get another equation only in x and y. Call this equation 5. You will need to slightly modify one of the equations to eliminate z. 
Step 3: Now that you have two equations in terms of only x and y ( Equations 4 and 5), use any method of your choice to solve for x and y.
Step 4: Now that you have x and y, solve for z using any of the first three equations.
<pre>The steps are all there for you to solve the system. What's holding you back?