Solution:
Demand for the financial capital is the investment + the government expenditure minus tax. Here only the one component investment is present. Therefore, the demand for the financial capital is 130.
Supply of the financial capital is savings is 130
15 plus 45 = 130 plus 0
The demand of the financial capital should always be equal to the supply of the financial capital
Demand = supply
Investment +government expenditure - tax = savings + trade deficit