If \(\begin{align*} 4x-y+2z&=7,\\ 6x+3y+3z&=5, \end{align*}\) compute \(y.\)
Multiply FIRST equation by - 1.5 to get
-6x +1.5y -3z = -10.5 add it to second equation
6x +3y +3z =5
to get
4.5y = -5.5
y = -1.222 ( or - 11/9)
+36916 
