2,8х-3(2х-1)=2,8-3,19х

Question

2,8х-3(2х-1)=2,8-3,19х

Answer 1

2,8х-3(2х-1)=2,8-3,19х

2,8х-6x+3=2,8-3,19х

-0,01x=−0,2

x=-0,2/(-0,01)

x=20.

 

Проверка:

2,8*20-6*20+3=2,8-3,19*20

-61=-61

Answer 2

2,8x-3(2x-1)=2,8-3,19x
2.8x-6x+3-2.8+3.19x=0

-3.2x+0.2+3.19x=0

-0.01x+0.2=0

x=-(-0.2)/0.01
x=0.2/0.01
x=20