Answer:The HI is 11.If that's what you mean..
Step-by-step explanation:
G=12
J=9
12+9=21
31-21=11
Note that
[tex]GH+HI+IJ=32[/tex]
We know that [tex]GH=12[/tex] and [tex]IJ=9[/tex], so we have
[tex]12+HI+9=32 \iff HI = 32-12-9 = 11[/tex]
