Problem  Solution 
\(\begin{align}
& 2x  y + 3z = 20 \\
& 7x + y + z = 23 \\
& 3x + y  z = 3
\end{align}\) 
Areallnamesgone70628 
 \(\begin{align}
& x + y + z = 6 \\
& 2x + y  z = 1 \\
& 3x  y + 2z = 7
\end{align}\)
 \(\begin{align}
& 2x  y + 3z = 15 \\
& 3x + 2y  4z = 11 \\
& 4x  3y + 2z = 14
\end{align}\)

The Organic Chemistry Tutor11435 
\(\begin{align}
& 3x + 2y + z = 1 \\
& x  2y + 2z = 4 \\
& 2x + 4y + 3z = 9
\end{align}\) 
YourMathGal8828 
 \(\begin{align}
& 4x + 2y + 3z = 1 \\
& 2x  3y + 5z = 14 \\
& 6x  y + 4z = 1
\end{align}\)
 \(\begin{align}
& x + y + z = 3 \\
& 1x + 4y + 4z = 7 \\
& 3x  y + 2z = 5
\end{align}\)
 \(\begin{align}
& x + y + z = 4 \\
& x + y  z = 4 \\
& 3x + 3y + z = 12
\end{align}\)

Ms Shaws Math Class29647 
\(\begin{align}
& 2x + y + 3z = 2 \\
& x  y  z = 3 \\
& 3x  2y + 3z = 12
\end{align}\) 
Brian McLogan22759 