Question

Решите систему неравенств:
{0.4x-1<0.5x-1.7      2.8x-17>0.3x-4.5

{2.7x-10<0.9x-1       12.3x-16.6<7.1x+19.8

Answer 1

$<var>\left \{ {{0.4x-1<0.5x-1.7 } \atop {2.8x-17>0.3x-4.5}} \right. </var>$

$<var>\left \{ {{0.4x-0.5x<1-1.7 } \atop {2.8x-0.3x>17-4.5}} \right. </var>$ 

$<var>\left \{ {{-0.1x<-0.7 } \atop {2.5x>12.5}} \right. </var>$ 

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

$<var>(7;+\infty)</var>$ 

 

 

 $<var>\left \{ {{2.7x-10<0.9x-1} \atop {12.3x-16.6<7.1x+19.8}} \right. </var>$

$<var>\left \{ {{2.7x-0.9x<10-1} \atop {12.3x-7.1x<16.6+19.8}} \right. </var>$ 

$<var>\left \{ {{1.8x<9} \atop {5.2x<36.4}} \right. </var>$ 

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

$<var>(-\infty;5)</var>$