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Answer

1 blouse + 1 skirt ——- 25
4 blouses + 4 skirts ——- 25 x 4 = 100
110 – 100 = 10

Ans : $10.

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1B + 1S = $25

Multiply by 4:  4B + 4S = $100

5B + 4S = $110

(5B + 4S) – (4B + 4S) = $110 – $100

1B = $10

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