In ΔGHI,
G
I
‾
GI
is extended through point I to point J,
m
∠
I
G
H
=
(
x
+
16
)
∘
m∠IGH=(x+16)
∘
,
m
∠
H
I
J
=
(
4
x
−
12
)
∘
m∠HIJ=(4x−12)
∘
, and
m
∠
G
H
I
=
(
x
+
10
)
∘
m∠GHI=(x+10)
∘
. Find
m
∠
G
H
I
.
m∠GHI.