Nominal Interest Rate Inflation:
Nominal interest rate inflation refers to the increase in the nominal interest rate over a certain period of time. It is the rate at which the price of borrowing money or the return on investment increases due to inflation. The nominal interest rate consists of two components: the real interest rate and the expected inflation rate.

Equation:
Nominal Interest Rate = Real Interest Rate + Expected Inflation Rate

Example:
Let's say the real interest rate is 3% and the expected inflation rate is 2%. The nominal interest rate would be 5% (3% + 2%). This means that if you borrowed money or invested in a product with a 5% nominal interest rate, you would expect to earn a 3% return on your investment after adjusting for inflation.

Real Interest Rate Inflation:
Real interest rate inflation refers to the increase in the real interest rate over a certain period of time. The real interest rate is the nominal interest rate adjusted for inflation, representing the true return on investment or cost of borrowing after accounting for changes in purchasing power.

Equation:
Real Interest Rate = Nominal Interest Rate - Inflation Rate

Example:
Let's say the nominal interest rate is 7% and the inflation rate is 3%. The real interest rate would be 4% (7% - 3%). This means that after adjusting for inflation, the true return on investment or cost of borrowing is 4%.

Solving Questions:
To solve questions related to nominal interest rate inflation and real interest rate inflation, follow these steps:

1. Identify the given nominal interest rate and inflation rate (expected or actual).
2. Use the equation for nominal interest rate to calculate the real interest rate by subtracting the inflation rate.
3. Use the equation for real interest rate to calculate the nominal interest rate by adding the inflation rate.
4. Apply the appropriate equation based on the information given in the question to solve for the desired variable (nominal interest rate, real interest rate, or inflation rate).

Summary:
Nominal interest rate inflation represents the increase in the nominal interest rate due to inflation, while real interest rate inflation represents the increase in the real interest rate after adjusting for inflation. The equations for these concepts allow us to calculate one variable when the others are given. Understanding these concepts is important for making informed borrowing or investment decisions and evaluating the true cost or return on financial transactions.