the sum of the digits in a 2 digit number is 7. if 9 is subtracted from the number, its digits are reversed. find the number
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Answered by
10
I think 43 is the answer
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sonu1464:
but where is 4
let no. on tens digits b 7- x =7-3=4
Answered by
12
let unit digit is = x
and tens digit is =7-x
and the num is 10(7-x)+x
to the question
10(7-x)+x-9=10x+(7-x)
x=3
unit digit is =3
and tens digit is 7-3=4
then the num is 40+3=43
and tens digit is =7-x
and the num is 10(7-x)+x
to the question
10(7-x)+x-9=10x+(7-x)
x=3
unit digit is =3
and tens digit is 7-3=4
then the num is 40+3=43
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