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" The sum of the two digits of a number is 9, and if 9 is added to the number, the digits will be reversed. Find the number. Let x — the tens' digit, and y = the units "
The First Steps in Algebra: By G. A. Wentworth ... - Page 162
by George Albert Wentworth - 1894 - 184 pages
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A school algebra to quadratic equations

Charles Mansford - 1875 - 110 pages
...digits, and if the number be divided by the product of the digits the quotient will be 3 ; and if 18 be added to the number the digits will be reversed. Find the number. 13. A person bought 2 sorts of cloth, giving 14 shillings for the one sort and £4 19s. for the other....
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A School Algebra

George Albert Wentworth - Algebra - 1890 - 518 pages
...— 9y = 27 x — y = 3 (1) is x + У= 9 Add, 2x =12 .-. x = 6 У = 3 Therefore the number is 63. 16. The sum of the two digits of a number is 9, and if the number is divided by the sum of the digits, the quotient is 5. Find the number. Let x = the tens'...
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A School Algebra

George Albert Wentworth - Algebra - 1891 - 380 pages
...+ 4 ; or, 100 times 3 + 10 times 6 + 4. Ex. The sum of the two digits of a number is 10, and if 18 is added to the number, the digits will be reversed. Find the number. Let x = tens' digit, and y = units' digit. Then 10 a; + y = the number. Hence a; + y = 10, (1) and Wx + y...
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A School Algebra

George Albert Wentworth - Algebra - 1895 - 376 pages
...therefore x = 4. Subtract (3) from (1), 2y =• 12, and therefore y =• 6. Therefore the number is 46. 15. The sum of the two digits of a number is 9, and 1f 27 is subtracted from the number, the digits will be reversed. Find the number. 16. The sum of the...
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Algebra for Beginners

Henry Sinclair Hall, Samual Ratcliffe Knight - 1895 - 214 pages
...find the number. 16. A certain number of two digits is four times the sum of the digits, and if 27 be added to the number the digits will be reversed ; find the number. 17. A certain number between 10 and 100 is six times the sum of the digits, and the number exceeds...
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A School Algebra

George Albert Wentworth - Algebra - 1896 - 520 pages
...digits of a number is 9, and if the number ¡s divided by the sum of the digits, the quotient is 5. Find the number. Let x= the tens' digit, and y = the units' digit. Then, 10 x + у — the number. (1) (2) From (2), 10x + y = 45 (3) Subtract (1) from (3), Therefore the number...
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A School Algebra: Designed for Use in High Schools and Academies

Emerson Elbridge White - Algebra - 1896 - 418 pages
...certain number expressed by two digits is equal to 4 times the sum of those digits ; but, if 18 be added to the number, the digits will be reversed. Find the number. 9. Said A to B, "If you give me $ 100, I shall then have as much money as you." — " Nay," replied...
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A School Algebra

George Albert Wentworth - Algebra - 1897 - 384 pages
...+ 4 ; or, 100 times 3 + 10 times 6 + 4. Ex. The sum of the two digits of a number is 10, and if 18 is added to the number, the digits will be reversed. Find the number. Let a; == tens' digit, and y = units' digit. Then 10 a; + у = the number. Hence x + у = 10, (1) and 10a;...
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American Comprehensive Arithmetic

Middlesex Alfred Bailey - Arithmetic - 1897 - 332 pages
...227. A certain number expressed by two digits, is equal to 4 times the sum of those digits ; if 27 is added to the number, the digits will be reversed. Find the number. Relations : units, digit + 10 times tens, digit = number ; 4 (units, digit + tens, digit) = number...
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A Graded Question Book: Examination Question from the Primaries to the High ...

F. J. Beck - 1899 - 288 pages
...x« — . 1 = 0, and x« — 5xz + 4 =.0. 7. The sum of the two digits of a number is 10, and if 18 is added to the number, the digits will be reversed. Find the number. 8. The sum of two numbers is 22, and the difference of their squares is 44; find the numbers. 9. The...
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