Answer and Explanation:
The journal entries are shown below
1.
On Denver books
Equipment Dr $17,000
Accumulated depreciation $60,000
Loss on sale of equipment $3,000
         To Equipment $80,000
(Being equipment recorded)
On Bristol books
Equipment Dr $17,000
Accumulated depreciation $25,000
     To Gain on sale of equipment $10,500
     To Equipment $31,500
(Being equipment recorded)
2.
On Denver books
Equipment Dr $20,000
Accumulated depreciation $60,000
         To Equipment $80,000
(Being equipment recorded)
On Bristol books
Equipment Dr $6,500
Accumulated depreciation $25,000
     To Equipment $31,500
(Being equipment recorded)