Question:
Bruce bought two books one Book cost four more than three times the other, together the two books cost him 72
. find prices for the two books
Answer:
The price of books are $ 17 and $ 55
Solution:
Let "x" be the cost of one book
Given that one Book cost four more than three times the other
Then, other book cost = 4 + 3x
Also given that together the two books cost 72
cost of one book + cost of other book = 72
x + 4 + 3x = 72
The above equation is used to solve the problem
x + 4 + 3x = 72
4x + 4 = 72
4x = 72 - 4
4x = 68
x = 17
Thus cost of one book is $ 17
Then cost of other book is 4 + 3x = 4 + 3(17) = 4 + 51 = 55
The other book costs $ 55