Algebra & Equations · Question 28 · Hard
If x + y = 10, y + z = 14 and z + x = 12, what is the value of xyz?
- 240
- 210
- 192
- 168
Answer and explanation
Answer: C. 192
Explanation: Adding all three: 2(x + y + z) = 36, so x + y + z = 18. Then z = 8, x = 4, y = 6, and xyz = 4 × 6 × 8 = 192.
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