Knowing the angles are equal, the value for y is 40.
Angle Bisector
The angle bisector is the line segment that divides the angle into two equal angles.
Thus, if OF is the angle bisector for EOG, the angles EOF and FOG are equal.
For finding y, you can write:
EOG=FOG
y+30=3y-50
y-3y=-50-30
-2y=-80
y=80/2
y=40
Read more about the angle bisector here:
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