2010 · Q66
If x(x + y + z) = 9, y(x + y + z) = 16 and z(x + y + z) = 144, then what is x equal to?
Elementary MathematicsAlgebra
- A9/5
- B9/7
- C9/13
- D16/13
Explanation
s=x+y+z; s²=169, s=13, x=9/13.
If x(x + y + z) = 9, y(x + y + z) = 16 and z(x + y + z) = 144, then what is x equal to?
Explanation
s=x+y+z; s²=169, s=13, x=9/13.