Problema Solution
A textbook store sold a combined total of
296
physics and sociology textbooks in a week. The number of physics textbooks sold was three times the number of sociology textbooks sold. How many textbooks of each type were sold?
Answer provided by our tutors
let
x = the number of physics textbooks sold
y = the number of sociology textbooks sold
A textbook store sold a combined total of 296 physics and sociology textbooks in a week:
x + y = 296
The number of physics textbooks sold was three times the number of sociology textbooks sold:
x = 3y
by solving the system of equations:
x + y = 296
x = 3y
we find:
x = 222 physics textbooks
y = 74 sociology textbooks
click here to see the step by step solution of the system of equations:
there were 222 physics textbooks and 74 sociology textbooks sold.