Answer:
The owner's equity be as of December 31, 20Y7 is $705
Explanation:
In this question, we apply the accounting equation which is given below
Total assets = Total liabilities + shareholder's equity
The question has said that the liabilities are decreased and the assets are increased.
So, the new asset is = total assets + increased amount
                 = $1,000 + $130
                 = $1,130
And, So, the new liability is = total liabilities - decreased amount
                 = $450 - $25
                 = $425
So, the shareholder equity would be equal to
= $1,130 - $425
= $705
Hence, the owner's equity be as of December 31, 20Y7 is $705