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BabaBlast [244]
3 years ago
12

Brainly if u awnser!

Mathematics
1 answer:
just olya [345]3 years ago
4 0

The formula of a perimeter of a rectangle l × w:

P = 2l + 2w

We have the perimeter P = 76 cm and the length l = 20 cm. Substitute:

76 = 2(20) + 2w

76 = 40 + 2w    <em>subtract 40 from both sides</em>

36 = 2w     <em>divide both sides by 2</em>

18 = w

Answer: width = 18 cm.

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