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Answer:
x = 12, y = 9, z = 11
Step-by-step explanation:
(3 x 5)^4 x (2 x 3)^5 x (2 x 5)^7
= 3^4 x 5^4 x 2^5 x 3^5 x 2^7 x 5^7
= 2^(5 + 7) x 3^(4 + 5) x 5^(4 + 7)
= 2^12 x 3^9 x 5^11
so x = 12, y = 9, z = 11