Problema Solution
At one store, 5 pairs of jeans and 2 sweatshirts costs $155, while 3 pairs of jeans and 4 sweatshirts costs $149. FInd the cost of one sweatshirt.
Answer provided by our tutors
let
x = the cost of one pair of jeans
y = the cost of one sweatshirt
5 pairs of jeans and 2 sweatshirts costs $155
5*x + 2*y = 155
3 pairs of jeans and 4 sweatshirts costs $149
3*x + 4*y = 149
by solving the system of equations
5*x + 2*y = 155
3*x + 4*y = 149
we find
x = $23
y = $20
The cost of one sweatshirt is $20.