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If A and B together can perform a piece of work in 8 days, A and C together in 9 days, and B and C in 10 days : how many days would it take each person to perform the same work alone ? Ans.
The Practical Analyst: Or, A Treatise on Algebra, Containing the Most Useful ... - Page 70
by Enoch Lewis - 1826 - 166 pages

Annual Report of the Normal, Model, and Common Schools in Upper Canada for ...

Upper Canada. Chief Superintendent of Schools - Education - 1854 - 196 pages
...whose product, is 150. 18. Given 2:c + y = 9, and2y + x = 15, and2z + y = 27, to find x, y and *. 19. A and B can perform a piece of work in 8 days, A and C in 9 days, and B and C in 10 days: hovr many days would it take each to perform the work alone T (Give the solution.) 20. Two pedestrians...

First Lessons in Algebra: In which the Elements of the Science are ...

Samuel Alsop - Algebra - 1856 - 152 pages
...second, and one-tenth the third make 6|. What are they ? - Ans. 12, 18 and 24. Ex. 5. A. and B. can do a piece of work in 8 days, A. and C. in 9 days, and B. and C. in 10 days. What time would it take each to perform it alone ? Ans. A. 14|j, B. 17f 3, C. 23 j\. Ex. 6. Required...

Key to Davies' Bourdon: With Many Additional Examples, Illustrating the ...

Charles Davies - Algebra - 1856 - 224 pages
...first equation, Ч---- clearing of fractions, 60 + 2x - 5x ; . • . * = 20. '20. If A and В together can perform a piece of work in 8 days, A and C together in.9 days, and B and C in 10 days: how many Jays would it take each person to perform the...

Key to Davies' Bourdon: With Many Additional Examples, Illustrating the ...

Charles Davies - Algebra - 1857 - 262 pages
...= 5x ; .-. x = 20. 20. If A and В together can perform a piece of work in 8 days, A and C together in 9 days, and B and C in 10 days : how many days would it take each person to perform the same work alone? Let the work be denoted by 1 ; Let x denote the...

Key to Dodd's Algebra: Containing All the Problems, and the More Difficult ...

James William Dodd - 1859 - 188 pages
...x+2 From these Equations we shall find x—4, and y=5. Hence the fraction is |. 26. A and B together can perform a piece of work in 8 days, A and C in...days, and B and C in 10 days. How many days would it take each person to perform the work alone ? Let x, y, and z respectively represent the number of...

Algebra for High Schools and Colleges: Containing a Systematic Exposition ...

James B. Dodd - Algebra - 1859 - 368 pages
...2, the value becomes f I Ans. |. 26. A and B together can perform a piece of work in 8 days, A and 0 in 9 days, and B and C in 10 days. How many days would it take each person to perform the same" work alone ? Let x, y, and z represent the number of days...

Elements of Algebra: On the Basis of M. Bourdon, Embracing Sturm's and ...

Charles Davies - Algebra - 1860 - 412 pages
...alone ? Ans. 20 days. 20. If A and B together can perform a piece of work in 8 days, A and C together in 9 days, and B and C in 10 days; how many days would it take each person to perform the same work alone ? Ans. A 14f |- days, B 17-|f , and C 23j7T. 21....

Elements of Algebra: On the Basis of M. Bourdon, Embracing Sturm's and ...

Charles Davies - Algebra - 1860 - 412 pages
...30 days; how many days would the man be in drinking it alone ? Ans. 20 days. 20. If A and B together can perform a piece of work in 8 days, A and C together in 9 days, and B and C in 10 days ; how many days would it take each person to perform the...