First customer spent $42 on each bundle of flower.
Number of bundles of roses bought by first customer = $42 divided by $7 = 6 bundles
6 x 4 = 24 stalks
Number of bundles of orchids bought by first customer = $42 divided by $14 = 3 bundles
3 x 9 = 27 stalks
Second customer bought equal number of stalks per flower for $119.
4 stalks cost $7 (multiply by 9)
9 stalks cost $14 (multiply by 4)
First, check the total amount.
$7 x 9 = $63
$14 x 4 = $56
Total = $63 + $56 = $119
Number of stalks of roses second customer bought = 9 x 4 = 36
Number of stalk of orchirds second customer bought is 4 x 9 = 36
Total number of stalk of roses and orchirds bought by both customer = 24 + 27 + 36 + 36 = 123