15=1/2+3/2x+10 I need help! I tried to look it up, but it didn't say anything! You can break it down if you want! I just need the solution of X (What X equals)!!

(01.02 lc) angle abc has point e on ray ba and point d on ray bc. points e and d are equidistant from point b. to bisect angle abc, which of the following needs to be identified for the construction? the distance between points e and d the point in the angle that is equidistant from points e and d the endpoint of rays ba and bc the point outside of the angle that is equidistant from points e and d