1.

Plz Explain Step By StepFour times a certain 2Two digit number is 7 times the number obtained on interchanging its digits if the difference between the digits is 4 .find the number

Answer»

Answer:

These are 4 and 8.

LET the no.'s be x and y...

4(10x+y) = 7 (10y+x)

40x+4y = 70y + 7x

33x = 66y

x= 2Y..............(1)

ACCORDING to qn x-y=4 (let x grtr than y)

x= 4+y... PUT in (1)

4+y = 2y

y= 4..

so, x= 4+4 = 8..



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