Question

the town library is raising money by selling old books for $2 each which equation can be used to find the amount of money raised if number of books sold is no let x represent the number of books sold and y represent the number of dollars raised

Answer 1

(6550)

Explanation:

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Call the number of hardcover and paperback books, h and p.

Thus

h + p = 8 and the value equation is

4h + 2p = 26

Now multiply the top one by four and subtract from the second one...we get

4h + 2p = 26

-(4h + 4p = 32)

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-2p = -6

p = 3 so that

h = 5 x + y = 8, (1)

4x + 2y = 26, (2)

where x and y are the numbers of hardcover and softcover books respectively.

To solve, multiply the equation (1) by 2 (both sides) and then distract it from the equation (2). You will get

4x - 2x = 26 - 16, or

2x = 10, or x = 5 - the number of hardcover books purchased.

Then from the equation (1) you get y = 3.

Check. 4*x + 2*3 = 4*5 + 2*3 = 26. OK.

Answer 2

y=2x

Explanation:

Attached, is a picture with all the work!