Respuesta :

Answer:

x = 7.5cm

Step-by-step explanation:

perimeter of the rectangle = 45cm

=> 2(2x + x) = 45

4x + 2x = 45

6x = 45

x = 7.5 (cm)

suspho

Answer:

x = 7.5

Step-by-step explanation:

The perimeter of the rectangle is 45 find out x

2x + 2x + x + x = 45

6x = 45

x = 45 : 6

x = 7.5

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check

2 * 7.5 + 2 * 7.5 + 7.5 + 7.5 = 45

the answer is good