Răspuns:
Explicație pas cu pas:
sistemul:
[tex]\left \{ {{3x-1 > -5x+3} \atop {2x+7 < 7x-18}} \right\\\left \{ {{3x+5x > 3+1} \atop {2x-7x < -18-7}} \right\\\left \{ {{8x > 4} \atop {-5x < -25}} \right\\\left \{ {{x > \frac{1}{2} } \atop {x > 5}} \right[/tex]
x∈(5;+∞)
