Ответ:
138,6/31,5 = x/0,4
138,6*0,4 = 31.5*x
31,5x = 55,44
x = 55,44/31,5
x = 1,76
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Ответ:
138,6/31,5 = x/0,4
138,6*0,4 = 31.5*x
31,5x = 55,44
x = 55,44/31,5
x = 1,76