Question 1204153
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EF is bisected at D, which means EF is split into two equal pieces ED and DF


EF = ED+DF 
EF = ED+ED
EF = 2*ED 
EF = 2*DE


EF = 2*DE
2x+22 = 2*(2x-4)
2x+22 = 4x-8
2x-4x = -8-22
-2x = -30
x = -30/(-2)
x = 15


Then,
AC = 3x-5
AC = 3*15-5
AC = 45-5
AC = <font color=red>40</font>
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