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The equation given in the problem is:

\[
u + 3 = 8
\]

To solve for \( u \), follow these steps:

1. Subtract 3 from both sides of the equation to isolate \( u \):

\[
u = 8 - 3
\]

2. Simplify the right-hand side:

\[
u = 5
\]

Thus, the solution is \( u = 5 \).

Would you like more details on this, or do you have any other questions? Here are some related problems you might explore:

1. Solve for \( x \): \( x + 7 = 15 \)
2. Solve for \( y \): \( y - 4 = 9 \)
3. Solve for \( z \): \( 2z + 3 = 11 \)
4. Solve for \( a \): \( a - 5 = 12 \)
5. Solve for \( p \): \( p + 10 = 20 \)

**Tip:** When solving linear equations, aim to isolate the variable by performing inverse operations on both sides of the equation.

Learn how to solve the linear equation u + 3 = 8 by isolating the variable u. This problem introduces algebraic concepts like isolating variables and properties of equality. Suitable for students in Grades 6-8.

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