{2.8x-17>0.3x-4.5 {12.3x-16.6<7.1x+19.8

Question

{2.8x-17>0.3x-4.5
{12.3x-16.6<7.1x+19.8

Answer 1

2,8x-0,3x>-4,5+17
12,3x-7,1x<19,8+16,6<br>
2,5x>12,5 / : 2,5
5,2x<36,4 / : 5,2<br>
x>5
x<7<br>