Question

5(2x-4)-2(4x-1) меньше или равно 2-5x

Answer 1

5 ( 2х - 4 ) - 2 ( 4х - 1 ) ≤ 2 - 5х
10х - 20 - 8х + 2 ≤ 2 - 5х
2х - 18 ≤ 2 - 5х
2х + 5х ≤ 2 + 18
7х ≤ 20
х ≤ 20/7
х ≤ 2 6/7.

Удачи)))))