Question

1. x + 9 = 12

Explanation:

Step1: Subtract 9 from both sides

To solve for \( x \), we need to isolate it. Subtract 9 from both sides of the equation \( x + 9 = 12 \). The equation becomes \( x + 9 - 9 = 12 - 9 \).

Step2: Simplify both sides

Simplifying the left side, \( x + 9 - 9 \) simplifies to \( x \). Simplifying the right side, \( 12 - 9 = 3 \). So we get \( x = 3 \).

Answer:

\( x = 3 \)