Question

Решите систему неравенств:
x>1
{
x>2,5
-------
0,4x-1<0,5x-1,7
{
2,7x-10<0,9x-1

Answer 1

{x>1
{x>2.5

ответ x∈(2.5;+∞)

{0.4x-1<0.5x-1.7
{2.7x-10<0.9x-1

{0.5x-0.4x>-1+1.7
{2.7x-0.9x>-1+10

{0.1x>0.7
{1.8x>9

{x>7
{x<5

ответ ∅