Answer:
-10/3 [tex]\leq[/tex] x [tex]\leq[/tex] -13/6
Step-by-step explanation
-3 [tex]\leq[/tex] 3x +7 [tex]\leq[/tex] 1/2
-10 [tex]\leq \\[/tex] 3x [tex]\leq[/tex] -13/2