- Eeste Write a real-worid problem that car hising the equation $12+x=16$. USE STRUCTURE COMpare and contrast the expression $x+1$ and the equation $x+1=2$.

Step 1 ：Real-World Problem: You have 12 apples and you want to give some apples to your friend so that you both have 16 apples in total. How many apples do you need to give to your friend?

Step 2 ：Solve the equation: \(12 + x = 16\)

Step 3 ：Subtract 12 from both sides: \(x = 4\)

Step 4 ：\(\boxed{4}\) apples need to be given to your friend.

Step 5 ：Comparison: Both the expression \(x+1\) and the equation \(x+1=2\) involve the variable x and the constant 1.

Step 6 ：Contrast: The expression \(x+1\) can take any value depending on the value of x, while the equation \(x+1=2\) has a specific solution for x.