To solve the equation \( x - 3 = 9 \), follow these steps:

1. Add 3 to both sides of the equation to isolate \( x \):

\[
x - 3 + 3 = 9 + 3
\]

2. Simplify:

\[
x = 12
\]

Thus, the solution is \( x = 12 \).

Would you like any further explanation, or do you have any questions?

### Related questions:
1. What is the process to solve an equation with variables on both sides?
2. How do you solve an equation with parentheses, like \( 2(x - 3) = 10 \)?
3. How do you solve a system of linear equations with two variables?
4. What is the method for solving quadratic equations?
5. How do you check if a solution to an equation is correct?

**Tip:** Always check your solution by plugging it back into the original equation.

Learn how to solve the linear equation x - 3 = 9 with a simple step-by-step approach. This problem covers fundamental algebraic concepts suitable for students in Grades 6-8. Understand the basics of isolating variables and solving linear equations.

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