The inequality given in the image is:

$5a + 9 \leq 2a + 15$

Steps to solve the inequality:

1. Move the variable terms to one side: Subtract $2a$ from both sides: $5a - 2a + 9 \leq 15$ Simplifying this gives: $3a + 9 \leq 15$

2. Move the constant term to the other side: Subtract 9 from both sides: $3a \leq 15 - 9$ Simplifying this gives: $3a \leq 6$

3. Solve for $a$: Divide both sides by 3: $a \leq \frac{6}{3}$ $a \leq 2$

Final solution:

$a \leq 2$

Let me know if you need further clarification or details!

Here are 5 related questions you might find useful:

1. How would you solve the inequality if it involved a negative coefficient?
2. What is the difference between solving an inequality and an equation?
3. Can you describe how to graph the solution $a \leq 2$ on a number line?
4. How do the properties of inequalities change when multiplying or dividing by a negative number?
5. Can you apply this method to solve $4x + 7 \geq 2x + 5$?

Tip: When solving inequalities, if you multiply or divide by a negative number, always remember to reverse the inequality sign!