Answer:
80 sets costing $25/set
120 sets costing $45/set
Step-by-step explanation:
let x = number of sets costing $25/set
let y = number of sets costing $45/set
we have to build eqautions form the info given
(1) . total sets = 200 x + y =200
(2) . total sets = 7400 25x + 45y = 7400
use the substitution method
(rest of work shown below in the picture)