Question

Решить систему система: x+5<6 4-x>7

Answer 1

<u />$\left \{ {{x+5<6} \atop {4-x>7}} \right. \left \{ {{x<1} \atop {-x<3}} \right. \left \{ {{x<1} \atop {x<-3}} \right.$
Ответ:x∈(-∞;-3)