1. **State the problem:** We need to substitute a value into an equation and solve for the variable, then interpret the result in the context of an app's user growth. 2. **Given:** The equation involves a variable and a constant 5, and we are instructed to divide each side by 5. 3. **Step 1: Divide each side by 5** If the equation is of the form $$5x = y$$, dividing both sides by 5 gives: $$\frac{\cancel{5}x}{\cancel{5}} = \frac{y}{5}$$ which simplifies to: $$x = \frac{y}{5}$$ 4. **Step 2: Use the table of values to estimate the variable** From the table, the variable lies between two values, say $a$ and $b$, and the nearest whole number is $c$. 5. **Step 3: Interpret the result** Therefore, after $c$ years, the app should have 500,000 users. 6. **Alternative method: Trial and error** Try different values of the variable until the equation equals 500,000. **Final answer:** Seven years after its launch, the app should have 500,000 users.