vmorgan4997
vmorgan4997 vmorgan4997
  • 02-05-2017
  • Mathematics
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The sum of the digits of a certain two-digit number is 7. Reversing its digits decreases the number by 27. Find the original number.

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lisee7 lisee7
  • 02-05-2017
X+Y= 7
Y-X= 27
2y=34
Y=17
X=-10
-10+17=7
17--10=27
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