Explanation:
Equation: 987 + 150x = 3500
x represents the number of days the family is staying at the park.
Solve.
Subtract 987 from both sides:
![150x = 2513](https://img.qammunity.org/2023/formulas/mathematics/college/lt8doezhmebyftl4akpxrmed1vgvx8qtxr.png)
Divide each side by 150:
![x= 16.75](https://img.qammunity.org/2023/formulas/mathematics/college/s4h1ikshx537irnz92oj8erg5lkv44mse5.png)
16.75 is decreased to 16, it's impossible to stay for 16.75 days.
The family can stay in the park for 16 days.