In triangle ABC, DE||BC. If AD=4,AE=8, DB=x-4 and EC=3x - 19, find x.
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if DE||BC
then AD/DB=AE/EC
so ,
4/x-4=8/3x-19
or, 12x-76=8x-32
or,. 4x=44
or,. x=11
then AD/DB=AE/EC
so ,
4/x-4=8/3x-19
or, 12x-76=8x-32
or,. 4x=44
or,. x=11
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