<p>Can someone show me how to do this? I keep getting 3. The answer is 2</p>
<p>[Yfrog</a> - satmc](<a href=“ImageShack - Best place for all of your image hosting and image sharing needs”>ImageShack - Best place for all of your image hosting and image sharing needs)</p>
<p>add all the equations together. All the variables on the right side are cancel out. Thus, you have</p>
<p>3z = 6
z = 2</p>
<p>oh ok thanks!</p>
<p>you just add all the equations together:</p>
<p>z = x - y + 4
z = y - w - 3
z = w - x + 5</p>
<p>when you add, the x and -x, y and -y, w and -w will cancel
so on the left side you’ll have z+z+z and on the right side all the constants
3z = 4 - 3 + 5
3z = 6
z = 2.</p>
<p>haha oblivi0n posted before i finished typing. yup yup =)</p>