Answer:
x = 4
Step-by-step explanation:
Using the sine ratio on right triangle KJL
and the exact value sin30° = 
sin30° =  =
 =  =
 =  =
 =  ( cross- multiply )
 ( cross- multiply )
2JL = 8 ( divide both sides by 2 )
 ( divide both sides by 2 )
JL = 4
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Using the sine ratio in right triangle JLM
and the exact value sin45° = 
sin45° =  =
 =  =
 =  =
 =  ( cross- multiply )
 ( cross- multiply )
x ×  = 4
 = 4 ( divide both sides by
 ( divide both sides by 
x = 4