Предмет: Математика, автор: polite

решите уравнение: 3(0.4 + 7) - 4(0.8x - 3) = 2

Ответы

Автор ответа: ЯОльга

0

3(0.4x+7)-4(0.8x-3)=2

1.2х+21-3,2х+12=2

33-2х=2

2х=33-2=31

х=31:2

х=15,5

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