Answer: 52
Explanation:
x + y = 12 and
$3.50x + $5.50y = $52
x + y = 12
x-x + y = 12 - x
y = 12 - x
$3.50x + $5.50 (12-x) = $52
3.50 x + 66 - 5.50x = 52
66-2x= 52
66-66-2x= 52-66
-2x = -14
2x = 14
x = 7
y = 12 - x
y = 12 - 7 = 5
Hence, you bought 7 calla lilies and 5 peonies!
Check:
3.50 (7) + 5.50 (5) = 24.50 + 27.50 = 52