Find the three digit number.

'XYZ' is a positive three digit natural number. where a,b,c are the digits and natural number.

• If 49X +7Y + Z = 258, find the number XYZ
• If 55X + 5Y + 2Z = 174, find the number XYZ
• If 3X+Y+36Z=100, find the number XYZ.

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