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First Principles of Algebra Volume 1; Elementary Course (Paperback) Loot Price: R455 Discovery Miles 4 550

# First Principles of Algebra Volume 1; Elementary Course (Paperback)

## Herbert Ellsworth Slaught

Loot Price R455 Discovery Miles 4 550

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1912 Excerpt: ...of a number. Express the number obtained by increasing each digit by 2. 124. Many problems may be solved, using either one or two unknowns. Ex. Find two numbers, whose sum is 20, such that when one of them is subtracted from twice the other, the remainder is 16. (a) Using one unknown. Let x represent one number. Then 20--x is the other number, and the equation is 2 x--(20--) = 16. (b) Using two unknowns. Let x and y represent the two numbers. Then, J + y = 20, The translation of problems into equations is usually easier when more than one unknown is permitted. This is due to the fact that in this case each of the given relations between the numbers is put down as a separate equation. PROBLEMS INVOLVING TWO VARIABLES 1.. If w and I are the width and length of a rectangle, express its area and also its perimeter in terms of w and I. 2. If the width of the rectangle in the preceding is increased by 10 and its length by 20, express its new perimeter and also its new area in terms of w and I. 3. If x and y represent the ages of a father and son respectively, represent the sum of their ages 5 years ago in terms of x and y; also the difference of their ages 8 years hence. 4. If a number consisting of two digits is increased by 15 by changing the order of its digits, which is greater, the digit in tens' or in units' place? 5. If a number is decreased by changing the order of its digits, which is greater, the digit in tens' or in units' place? In solving the following problems, use two variables in each case: 6. A rectangular field is 32 rods longer than it is wide. The length of the fence around it is 308 rods. Find the dimensions of the field. 7. Find two numbers such that 7 times the first plus 4 times the second equals 37; while 3 times the first plus 9 times th...

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 Imprint: Rarebooksclub.com Country of origin: United States Release date: March 2012 First published: March 2012 Authors: Herbert Ellsworth Slaught Dimensions: 246 x 189 x 3mm (L x W x T) Format: Paperback - Trade Pages: 52 ISBN-13: 978-1-130-26819-5 Barcode: 9781130268195 Categories: Books LSN: 1-130-26819-5

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