Respuesta :

This is an isosceles triangle, therefore we have two sides with the same length.
This sides are JM and MK; therefore:
JM=MK

JM=9x-18
MK=3x

Therefore:
9x-18=3x
9x-3x=18
6x=18
x=18/6
x=3

Part A:
Answer:  x=3 

Part B:
JM=9x-18=9(3)-18=27-18=9

Answer: JM=9

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