Solution: A phone plan charges a fixed fee plus £0.12 per minute. If 250 minutes cost £41, find the fixed fee.

Code:

import sympy

# Define variables
fixed_fee = sympy.Symbol('f')
rate_per_minute = 0.12
minutes = 250
total_cost = 41

# Equation: fixed_fee + rate_per_minute * minutes = total_cost
equation = sympy.Eq(fixed_fee + rate_per_minute * minutes, total_cost)
solution = sympy.solve(equation, fixed_fee)

print(f"Equation: {equation}")
print(f"Fixed Fee: {solution[0]}")

Output:

Equation: Eq(f + 30.0, 41)
Fixed Fee: 11.0000000000000