Предмет: Математика, автор: marivesnina0810

Помогите решить уравнение. Срочно!!!
2^3-х=0,4*5^3-х

Ответы

Автор ответа: mikhailmelehin

1

0,4=4/10=2/5

2/5=2^(3-x)/5^(3-x)

(2/5)^1=(2/5)^3-x

1=3-x

x=2

Ответ: 2

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