If [x+y+z x+y y+z] = [9 5 7] then the value of (x, y, z) is:

Question

If [x+y+z x+y y+z] = [9 5 7] then the value of (x, y, z) is: (A) (4, 3, 2) (B) (3, 2, 4) (C) (2, 3, 4) (D) none

Tardigrade Admin · Accepted Answer

Given:
x + y = 5 ...(i)
y + z = 7 ...(ii)
and x + y + z = 9 ...(iii)
Putting the value of x + y = 5 in equation (iii)
we get
z = 9 - 5 = 4
So, y = 7 - 4 = 3 and x = 5 - 3 = 2
thus x = 2, y = 3 and z = 4.

Q. If ⎣⎡​x+y+zx+yy+z​⎦⎤​=⎣⎡​957​⎦⎤​ then the value of (x, y, z) is:

(4, 3, 2)

(3, 2, 4)

(2, 3, 4)

none

Given: x + y = 5 ...(i) y + z = 7 ...(ii) and x + y + z = 9 ...(iii) Putting the value of x + y = 5 in equation (iii) we get z = 9 - 5 = 4 So, y = 7 - 4 = 3 and x = 5 - 3 = 2 thus x = 2, y = 3 and z = 4.

Q. If $⎣ ⎡ x + y + z x + y y + z ⎦ ⎤ = ⎣ ⎡ 957 ⎦ ⎤$ then the value of (x, y, z) is:

Given:
x + y = 5 ...(i)
y + z = 7 ...(ii)
and x + y + z = 9 ...(iii)
Putting the value of x + y = 5 in equation (iii)
we get
z = 9 - 5 = 4
So, y = 7 - 4 = 3 and x = 5 - 3 = 2
thus x = 2, y = 3 and z = 4.