Question

Решите систему неравенств: 4x+11>31, 5-3x<17

Answer 1

$\left \{ {{4x+11>31} \atop {5-3x<17}} \right. \\\\\left \{ {{4x>31-11} \atop {-3x<17-5}} \right. \\\\\left \{ {{4x>20} \atop {-3x<12}} \right. \\\\\left \{ {{x>20:4} \atop {x>12:(-3)}} \right. \\\\\left \{ {{x>5} \atop {x>-4}} \right.$

x ∈ ( 5 ; +∞ )