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Genrish500 [490]
3 years ago
14

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

Mathematics
2 answers:
Leokris [45]3 years ago
4 0
<span>the tens digit = n
</span><span>the units digit = n-5

n + n-5 = 9
2n = 9+5
2n = 14
n = 7  </span>←  the tens digit

the units digit = n-5 = 7 - 5 = 2

<span>the number is 72</span>
maw [93]3 years ago
4 0

Answer: 72

Step-by-step explanation:

Let x represents the units digit of the number, then the value of tens digit will be x+5.

According to the question , we have the following equation:-

\Rightarrow\ x+x+5=9\\\\\Rightarrow 2x+5=9

Subtract 5 on both sides , we get

2x=4

Now, Divide 2 on the both sides , we get

x=2

Now, the unit digit of the number = 2

The tens digit of the number = 2+5=7

Then , the number will be : 72

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