Question

помогите!!!
3) { 2,8х-17>0,3х-4,5

    { 12,3х-16,6<7,1х+19,8

Answer 1

$left { {{2.8x-17>0.3x-4.5} atop {12.3x-16.6<7.1x+19.8}} right.$

$left { {{2.8x-0.3x >17-4.5} atop {12.3x-7.1x<19.8+16.6}} right.$

$left { {{2.5x>12.5} atop {5.2x<36.4}} right.$

$left { {{x>5} atop {x<7}} right.$

5<x<7