Assignment:
Q1. Three times one number equals one-fourth of another number. If the sum of four times the first number and twelve equals three times the second number, then what are the two numbers?
Q2. Mrs. Montero invested $10,000, part at 9% and the remainder at 10% per year. If at the end of 5 years the two investments had earned $4,800 in simple interest, what amount was invested at 9%?
Provide complete and step by step solution for the question and show calculations and use formulas.