The cost of 5 boxes of small paper clips and 2 boxes of large paper clips is $49.30. 7 boxes of small clips and 4 boxes of large ones cost $79.10. Find the cost
Mathematics
Einstein3
Question
The cost of 5 boxes of small paper clips and 2 boxes of large paper clips is $49.30. 7 boxes of small clips and 4 boxes of large ones cost $79.10. Find the cost of a box of each size of paper clips.
1 Answer

1. User Answers ZacMac
5x + 2y = 49.30
7x + 4y = 79.10
5x + 2y = 49.3
2y = 49.3  5x
y = 24.65  2.5x
7x + 4( 24.65  2.5x ) = 79.1
7x + 98.6  10x = 79.1
3x = 19.5
x = 6.5
5( 6.5 ) + 2y = 49.3
32.5 + 2y = 49.3
2y = 16.8
y = 8.4
big box = $8.40
small box = $6.50