Answer: x=4
HJ=13
JK=5
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
JK=3(4)-7
JK=12-7
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