Final answer:
To solve for the variable P in the simple interest formula, rearrange the formula as P = I / (r * t) and substitute the values of I, r, and t.
Step-by-step explanation:
To solve for the variable P in the simple interest formula, we can rearrange the formula as follows:
P = I / (r * t)
This formula allows us to calculate the principal amount based on the interest, rate, and time given. Simply substitute the values of I, r, and t into the formula to find the value of P.