Tom's Study Time Inequality

Tom is studying for his Digital SAT exam. He represents his study time each day with the function y = 3x + 2, where y is the total hours he studies and x is the number of days he has been studying.

One week, Tom decides he wants to study at least 20 hours in total. Write and solve an inequality to find the minimum number of days, x, that Tom needs to study to achieve his goal.