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August 29, 2015
Posted by **Joe Mhar Plaza** on Thursday, January 6, 2011 at 10:10pm.

- Math -
**Writeacher**, Thursday, January 6, 2011 at 10:14pmAssistance needed.

- tres ninos school -
**Reiny**, Thursday, January 6, 2011 at 10:28pmlet the unit digit be x

let the tens digit be y

so the "value" of the two digit number is 10y + x

and then you said:

10y + x = 11y

x = y

but we also know x+y = 12

mmmh? Can you think of two numbers that are equal and add up to 12 without doing the algebra?