Question

{1-0,5х<4-х
{9+2,8х>6-1,3х

Answer 1

$left { {{1-0.5x textless 4-x} atop {9+2.8x textgreater 6-1.3x}} right.$
$left { {{-0.5x+x textless 4-1} atop {2.8x+1.3x textgreater 6-9}} right.$
$left { {{0.5x textless 3} atop {4.1x textgreater -3}} right.$
$left { {{x textless 6} atop {x textgreater -3:4.1}} right.$
$left { {{x textless 6} atop {x textgreater -3:frac{41}{10}}} right.$
$left { {{x textless 6} atop {x textgreater -3*frac{10}{41}}} right.$
$left { {{x textless 6} atop {x textgreater -frac{30}{41}}} right.$
x∈($- frac{30}{41},$ $6$)