poppyme
26.06.2019 •
Mathematics
When you reverse the digits in a certain two digit number you decrease it’s value by 36. find the number if the sum of its digits is 10
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Ответ:
The number is 73.
Step-by-step explanation:
I. 10b + a = 10a + b - 36
II. a + b = 10 --> b = 10 - a
II in I
10b + a = 10a + b - 36
9b = 9a - 36
9(10 - a) = 9a - 36
90 - 9a = 9a - 36
126 = 18a
a = 7
b = 10 - 7 = 3
Ответ: