Question

Решите систему неравенств:
а) { 8x+5≥9x-7
{-12x+6>-15x-9

б) { 5x+7>-3
{ 8x<16

Answer 1

{ 8x+5≥9x-7

{-12x+6>-15x-9

{х=12

{х=-5

х∈(-5;12]

                                                                                

{5x+7>-3

{8x<16

{х>-2

{х<2

х∈(-2;2)