Решите систему неравенств:{0.4x-1 меньше 0.5x-1.7      2.8x-17 больше 0.3x-4.5 {2.7x-10 меньше 0.9x-1       12.3x-16.6 меньше 7.1x+19.8

[latex]\left \{ {{0.4x-1<0.5x-1.7 } \atop {2.8x-17>0.3x-4.5}} \right. [/latex] [latex]\left \{ {{0.4x-0.5x<1-1.7 } \atop {2.8x-0.3x>17-4.5}} \right. [/latex]  [latex]\left \{ {{-0.1x<-0.7 } \atop {2.5x>12.5}} \right. [/latex]  [latex]\left \{ {{x>7 } \atop {x>5}} \right. [/latex] [latex](7;+\infty)[/latex]       [latex]\left \{ {{2.7x-10<0.9x-1} \atop {12.3x-16.6<7.1x+19.8}} \right. [/latex] [latex]\left \{ {{2.7x-0.9x<10-1} \atop {12.3x-7.1x<16.6+19.8}} \right. [/latex]  [latex]\left \{ {{1.8x<9} \atop {5.2x<36.4}} \right. [/latex]  [latex]\left \{ {{x<5} \atop {x<7}} \right. [/latex]  [latex](-\infty;5)[/latex]