Răspuns :
13,24 :4 +3 x X <= 11,5
3,31 +3x <=11,5
3x <= 11,5 - 3,31
3x <= 8,19
x<= 8,19 :3
x<= 2, 73
x = 2,1,0
3,31 +3x <=11,5
3x <= 11,5 - 3,31
3x <= 8,19
x<= 8,19 :3
x<= 2, 73
x = 2,1,0