Q:

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

Accepted Solution

A:
Answer:(6550)Step-by-step explanation:You can put this solution on YOUR website! 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) ---------------- -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.