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The sum of a certain two-digit number is 7. Reversing its digits increases the number by 9. What is the number?

Sagot :

IEatNutella

Answer:

34

Step-by-step explanation:

nolovesimba5

Answer:

b=4 a=3

The first digit is 3 and the second 4 so the original number is 34

To be honest! It would be much quicker to solve by trial and error.

Explanation:

Building the equations

Let the first digit be  

a

Let the second digit be  

b

The first condition

a

+

b

=

7

...............................(1)

Step-by-step explanation:

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