Question

a no. consists of two digits whose sum is 7. If 45 is added to the no. the digits are reversed. Find the no

Answer 1

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.....

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Answer 2

Answer:

16

Step-by-step explanation:

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