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The sum of the digit of a two digit number is 10.if 18 be substracted from it the digit in the resulting number will be equal.the number is



The two digit number--> _ _
 let the two digit number be 'a'
therefore, the number is 28
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this is wrong anwer correct answer  is 73 .but i dont know how ? 
srry if if i wasn't of any help
Number is 9 and 1 (9+1 =10, 18-9=9).
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