What is the answer to this problem i have

If angle 2=3x +1 and angle 3=2x +4what is angle 2

Dakota earned $7.50 in interest in account a and $18.75 in interest in account b after 15 months. if the simple interest rate is 4% for account a and 5% for account b, which account has the greater principal? explain. to make it a little easier, there is an image. good luck!

Which equation represents the function on the graph?