To solve the equation \( x + 9 = 4x \), follow these steps:

1. Subtract \( x \) from both sides of the equation to get all \( x \)-terms on one side:
   \[
   x + 9 - x = 4x - x
   \]
   Simplifying this, we get:
   \[
   9 = 3x
   \]

2. Divide

Learn how to solve the linear equation x + 9 = 4x with a detailed step-by-step solution. This problem covers key algebraic concepts, including linear equations and variable manipulation. Suitable for students in Grades 7-9.

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