Respuesta :

Answer: x=4

HJ=13

JK=5

Step-by-step explanation:

KH=HJ+JK

18=2x+5+3x-7

18=2x+3x+5-7

18=5x-2

5x=20

x=4

HJ=2x+5

HJ=2(4)+5

HJ=8+5

HJ=13

JK=3(4)-7

JK=12-7

JK=5