Tricky Question From Stanford University Entrance Exam l find x,y,z!

Tricky Question From Stanford University Entrance Exam l find x,y,z! #mathsolympiad #maths #mathcompetition #mathematics #mathcontest #education #equation #solution #teacher #tricks

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Thank you for explaining. There are infinite solutions. Ex.: (x, y, z) = (5, 4, 5), (3, 9, 7), (21, 1, 1), (2, 100, 1004), ・・・
Are there any conditions about (x, y, z) [except they are natural numbers] in an original problem? (If not, there are infinite solutions.)