SOLUTION: on friday, the with it clothiers sold some jeans at $25 a pair and some shirts at $18 each. receipts for the day totaled at $441. on saturday the store prices. both items at $20, s

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: on friday, the with it clothiers sold some jeans at $25 a pair and some shirts at $18 each. receipts for the day totaled at $441. on saturday the store prices. both items at $20, s      Log On


   



Question 1098936: on friday, the with it clothiers sold some jeans at $25 a pair and some shirts at $18 each. receipts for the day totaled at $441. on saturday the store prices. both items at $20, sold exactly the sane number of each item and had receipts of $420. how many pairs of jeans or how many shirts were sold each day
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let +a+ = number of jeans sold on friday ( also sat )
Let +b+ = number of shirts sold on friday ( also sat )
--------------------------------------------
(1) +25a+%2B+18b+=+441+
(2) +20a+%2B+20b+=+420+
-----------------------------
(2) +a+%2B+b+=+21+
(2) +b+=+21+-+a+
Plug (2) into (1)
(1) +25a+%2B+18%2A%28+21+-+a+%29+=+441+
(1) +25a+%2B+378+-+18a+=+441+
(1) +7a+=+63+
(1) +a+=+9+
and
(2) +b+=+21+-+9+
(2) +b+=+12+
9 jeans were sold on friday ( also sat )
12 shirts were sold on friday ( also sat )