Solve the following system of linear equations:

x + y − z = 3 (1)

2x + y − z = 4 (2)

2x + 2y + z = 12 (3).

The sum of the values of x, y and z of the solution is

[1] −3.

[2] −1.

[3] 7.

[4] 19.

[5] none of the above.

asked by guest
on Nov 17, 2024 at 3:00 am



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