Answer:
you want to isolate x so just add 16 to the right side (-4)
so -16 + x = -4
+16 +16
x=12
hope this helps :)
x = 10
since GI bisects ∠DGH then ∠DGI = ∠IGH, hence
2x - 13 = x - 3 ( subtract x from both sides )
x - 13 = - 3 ( add 13 to both sides )
x = 10
Angle #8 represents angle EHK
