The sum of the digits of a two digit number is 9. The number obtained by interchanging its digits is
9 less than thrice the original number. Find the number.
Solve by One Variable.
please Answer my Question.
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The sum of the digits of a two digit number is 9. The number obtained by interchanging its digits is
9 less than thrice the original number. Find the number.
Solve by One Variable.
please Answer my Question.
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Answer:
27
Step-by-step explanation:
let 2 digits be x,y
sum of digits x+y=9
the number obtained by interchanging the digits
let y be in units place
x be in tens place
original number is 10*x+y
interchanging number is 10*y+x
the interchanged number is 9 less than trice the original number
3(10*x+y)-(10*y+x)=9
29*x-7*y=9----------------(1)
x+y=9------------------------(2)
by solving (1) and (2)
we get x=2 y=7
finally 27 is the number