Let the bag cost 1 unit. Blouse = 2 units. Skirt = 1 unit + 4.20.
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• Total = 1 unit + 2 units + 1 unit + 4.20 = 4 units + 4.20 = 00
• 4 units = 00 − 4.20 = 5.80
• 1 unit = 5.80 ÷ 4 = 1.45 (bag)
• Blouse = 2 × 1.45 = 2.90
• Skirt = 1.45 + 4.20 = 5.65
• Blouse cost more than skirt: 2.90 − 5.65 = .25
The blouse cost .25 more than the skirt.
Check: 1.45 + 2.90 + 5.65 = 00. ✓