1. The problem is to solve the equation labeled as q15. Since the exact equation is not provided, I will demonstrate how to solve a typical algebraic equation step-by-step. 2. Suppose q15 is the equation $$2x + 3 = 11$$. The goal is to find the value of $x$. 3. Use the subtraction property of equality to isolate the term with $x$: $$2x + 3 = 11$$ Subtract 3 from both sides: $$2x + \cancel{3} - \cancel{3} = 11 - 3$$ which simplifies to $$2x = 8$$ 4. Next, divide both sides by 2 to solve for $x$: $$\frac{2x}{\cancel{2}} = \frac{8}{\cancel{2}}$$ which simplifies to $$x = 4$$ 5. Therefore, the solution to the equation is $x = 4$. If you provide the exact equation for q15, I can solve that specifically.