If the sum of two numbers is 42 one number plus two then times the other number is 57 what are the two numbers?

If X+Y = 42, and 2X + Y = 57, then if you subtract the first equation from the second,

2X + 1Y = 57

1X + 1Y = 42 -

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1X + 0Y = 15

That means that Y = 27.

15 + 27 = 42

15 + 15 + 27 = 57.