the sum of the digits of a two digit number is 7 if the digits are reversed the new number formed is 9 less than the original number. what is the original number
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Step-by-step explanation:
Let the ones's digit =x.
So, sum of the digits =7
Tens's digit =7−x
Original no. =10(7−x)+x=70−10x+x=70−9x
Reversed no. =10x+7−x=9x+7
2(orig no) = reversed no. −2
2(70−9x)=9x+7−2
140−18x=9x+5
27x=135
x=5
Ten's digit =7−5=2
No. =25
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Answer:
answer is 53
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