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Note: Take the digits as x and 9-x |
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Answer» Step-by-step explanation: LET unit digit be x TEN's digit be 9- x original NUMBERS= 10 (9 - x ) + x = 90 - 9x REVERSE no. = 10x + 9 - x =9x + 9 original no. - 27 = reverse no. 90- 9x -27=9x +9 63-9x = 9x + 9 63+9= 9x +9x 72 = 18x 72/18=x 4= x unit digit = 4 ten's digit = 9-4 =5 therefore, the number is 54 |
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