SSE JE Electrical Engineering 10 Dec 2020 Papers

According to question:
X + Y + Z = 96 -------(1)
and, Z = 2X ----------(2)
and, X + Y = 2Z --------(3)
Put value of Z in equation (1) and (3)
X + Y + Z = 96
2Z + Z = 96
3Z = 96
Z = 32
Put the value of Z in equation (2)
Z = 2X
2X = 32
X = 16
Put the value of X and Z in Equation 1
X + Y + Z = 96
16 + Y + 32 = 96
Y + 48 = 96
Y = 48
Hence, "48" is the correct answer.