<PRE><B>Question 256063</B>
On Friday, the With-It Clothiers sol some jeans at $25 a pair and some shirts at $18 each. receipts for the day totaled $441. On saturday the store priced both items at $20, sol exactly the same number of each item, and ha receipts of $420. how many pairs of jeans an how many shirts were sold each day? 

J=number of jeans , S=number of shirts

25*J+18*S=441
20*J+20*S=420

solve second equation for either J or S and use subsitution, am gonna choose J

20*J=420-20*S
J=21-S  (plug this into 1st equation and solve for S)

25(21-S)+18*S=441
25*21 - 25*S +18*S = 441
25*21 -7*S = 441 (25*21=525)
-7*S = 441 - 525
-7*S = -84
   S = 12 shirts  (plug this into 2nd equation and solve for J)

20*J+20*12=420 (divide by 20)
J+12=21
J=9 pairs of jeans






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