Respostas

2014-07-06T15:01:00-03:00
2x + 2y = 16

x + y = 8

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x/y = 5/3

x = 5y/3

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x + y = 8

5y/3 + y = 8

5y + 3y = 24

8y = 24

y =3 cm

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x + y = 8

x = 8-3

x = 5 cm

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A = b.h
A = 5.3

A = 15 cm²