\(\begin{cases} x + 2y + 3z = 10 \\ 3x + 6y + 10z = 31 \\ 5x +11y + 15z = 52\end{cases}\)
Determine the value of x + y - z.
+36916 Multiply first equatin by -3 then add to second equation to solve for z as a start......
then multiply first equation by -5 and add to third equation to solve for y
then use the values of z and y that you have found in any of the equations to solve for x
