Answer: 
x=74
Step-by-step explanation: 
if angle ABE = 148. then, angle EBC = 32
and for angle ECB an BEC, 
180-32 = 148 
148/2 = 74 
so, angle ECB and angle BEC = 74
we know, angle BCE and angle CEF are equal because they are alternate angles
so, x = 74