Question

Решить систему уравнений

Answer 1

Должно быть нормально видно, вроде)

Answer 2

Спасибо

Answer 3

$left { {{-3x textless 12 | * (-1)} atop {5x leq 30}} right. \\ left { {{-3x*(-1) textgreater 12*(-1)} atop {5*x leq 5*6}} right. \\ left { {{3x textgreater -12} atop {x leq 6}} right. \\ left { {{3*x textgreater 3*(-4)} atop {x leq 6}} right. \\ left { {{x textgreater -4} atop {x leq 6}} right. \\ -4 textless x leq 6\\ xin(-4; 6]$