Question:
Solving a system of 3 linear equations.
Question 1: Solve these linear equations for x, y, and z,
3x + 5y - 2x = 20
4x - 10y - z = -25
x + y - z = 5
the value of x is in the range
(1) -4 <= x <= -3
(2) -2 <= x <= 0
(3) 0 <= x <= 2
(4) 2 <= x <= 4
Note: "<=" means "less than or equal to"
Question 2: The value of y in Question 1 above lies in the range
(1) -4 <= y <= -2
(2) -2 <= y <= 0
(3) 0 <= y <= 2
(4) 2 <= y <= 4