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jaylaisthe

Answer: 17

Step-by-step explanation: You take 47, multiply it by 2 and you should get 94. Subtract 128 and 94 which =34. Since the perimeter = 2 times the original width you divide that by 2 and get 17.

Step-by-step explanation:

[tex]P = 2w + 2l \\ P = 2(w + l) \\ 128 = 2(w + 47) \\ w + 47 = 64 \\ w = 17 \: cm[/tex]

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