Answer and Explanation:
The adjusting entries are shown below
On Jan 1
Patent Dr $100,000
To Cash $100,000
(Being patent purchased on cash is recorded)
Here patent is debited as it increased the assets and credited the cash as it decreased the assets
On Dec 31
Amortization expense - Patent ($100,000 ÷ 20 years) $5,000
To Accumulated amortization - Patent $5,000
(being amortization expense is recorded)
Here amortization expense is debited as it increased the expense and credited the accumulated depreciation as it decreased the assets