aylagassner aylagassner

03-06-2020
Mathematics

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The tens digit of a certain number is five more than the units digit. The sum of the digits is 9. Find the number.

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yyellowcreek yyellowcreek

03-06-2020

Answer:

Number = 72

Step-by-step explanation:

unit digit--- x

tens digit--- x + 5

x + x + 5 = 9

2x + 5 = 9

2x + 5 - 5 = 9 - 5

2x = 4

x = 2

2 + 5 = 7

tens digit = 7

number = 72

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