Question 229991
The sum of the digits of a two digit number is 12. (So, I am thinking the problem for that statement would be x + y = 12)
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That's right, but also we know: x = 10's digit and y = units; therefore:
the number = 10x + y
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The number is 13 times the tens digit. Find the number. 
10x + y = 13x
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Now you can substitute (12-x) for y and solve for x, then find y 
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you should get a number of 39
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