Respuesta :

suspho

(18 * 2)*5 = 18*2x

36 * 5 = 18 * 2x

180 = 18 * 2x

2x = 180 : 18

2x = 10

x = 10 : 2

x = 5

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(18 * 2)*5 = 18* 10

180 = 180