 | Bewick Bridge - Algebra - 1818 - 254 pages
...number required. QUESTION lu. There Js a certain number, consisting of two digits. The sum of those digits is 5 ; and if 9 be added to the number itself, the digits will be inverted. What is the number ? Let x= left-hand digit. y=right-hand digit. Then by Art. 63. 10x + i/=the number... | |
 | Adrien Marie Legendre - Geometry - 1819 - 574 pages
...the fish 2 .'lus. 721 bs. 60. There is a certain number, consisting of two digits, the sum of which digits is 5 ; and if 9 be added to the number itself the digits will be inverted : what is the number ? Ans. S3, 61. A person found, upon beginning the study of his profession, that... | |
 | Leonhard Euler - Algebra - 1821 - 380 pages
...same quantity. Ans. 6|. 136. There is a certain number, consisting of two digits. The sum of these digits is 5, and if 9 be added to the number itself the digits will be inverted. What is the number ? Ms. 23. 137. What number is that, to whirh if I add 20 and from f of this gum... | |
 | Bewick Bridge - Algebra - 1821 - 284 pages
...number required. QUESTION 16. There is a certain number, consisting of two digits. The sum of those digits is 5 ; and if 9 be added to the number itself, the digits will be inverted. What is the number ? Let x= left-hand digit. y = right-hand digit. Then by Art. 63. 10ж+y = 1пе... | |
 | James Ryan - Algebra - 1824 - 550 pages
...shillings in his pocket. Prob. 6. There is a certain number, consisting of two digits. The sum of Ihose digits is 5 ; and if 9 be added to the number itself, the digits will be inverted. What is the number ? Here it may be observed, that every number consisting of two digits is equal to... | |
 | James Ryan, Robert Adrain - Algebra - 1824 - 542 pages
...shillings in his pocket. Trob. 6. There is a certain number, consisting of two digits. The sum of those digits is 5; and if 9 be added to the number itself, the digits will be inverted. What is the number ? * Here it may be observed, that every number consisting of two digits is equal... | |
 | Silvestre François Lacroix - Arithmetic - 1825 - 394 pages
...same quantity. Aw. 6£. 136. There is a certain number, consisting of two digits. The sum of these digits is 5, and if 9 be added to the number itself the digits will be inverted. What is the number ? Ans. 23. 137. What number is that, to which if I add 20 and from | of this sum... | |
 | Silvestre François Lacroix - Algebra - 1825 - 324 pages
...of the fish ? Ans. 72 Ibs. 60. There is a certain number, consisting of two digits, the sum of which digits is 5 ; and if 9 be added to the number itself the digits will be inverted : what is the number ? Ans. 23. 61. A person found, upon beginning the study of his profession, that... | |
 | Silvestre François Lacroix - Arithmetic - 1825 - 404 pages
...same quantity. .4ns. 6|. 136. There is a certain number, consisting of two digits. The sum of these digits is 5, and if 9 be added to the number itself the digits will be inverted. What is the number ? An'. 23. 137. What number is that, to which if I add 20 and from § of this sum... | |
 | Bewick Bridge - Algebra - 1839 - 280 pages
...number required. QUESTION 16. There is a certain number, consisting of two digits. The sum of those digits is 5 ; and if 9 be added to the number itself, the digits will be inverted. What is the number 1 Let x=left hand digit ; y= right hand digit. Then, by Art. 61. 10x+y=the number... | |
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The sum of these digits is 5, and if 9 be added to the number itself the digits will be inverted. 
