Question

A number has two digits whole sum is 7. If 45 is added to this number, the digits get interchange, Find the answer?​

Answer 1

Answer:

answer will be 16........

let one no. be 10x+7-×

=9x+7

other after reversing will be 10 (7-x)+x

70-10x+x=70-9x

given,

9x+7+45=70-9x

9x+9x=70-52

18x=18

x=1

so no. will be 9x + 7=9×1+7

9+7=16.....

Hope this helps.

You are welcome!!

Answer 2

Answer:

16

Step-by-step explanation:

Steps:

Given,

let one no. be 10x+7-×

=9x+7

other after reversing will be 10 (7-x)+x

70-10x+x=70-9x

given,

9x+7+45=70-9x

9x+9x=70-52

18x=18

x=1

so no. will be 9x + 7=9×1+7

9+7=16.

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