Question

simplify the expression $6x + 9 + 3x - x$ by combining like terms.
\boxed{}x + \boxed{}

Explanation:

Step1: Identify like terms

The terms with \( x \) are \( 6x \), \( 3x \), and \( -x \). The constant term is \( 9 \).

Step2: Combine like terms with \( x \)

\( 6x + 3x - x=(6 + 3 - 1)x = 8x \)

Step3: The constant term remains

The constant term is \( 9 \).

Answer:

\( 8x + 9 \) (So the first box is \( 8 \) and the second box is \( 9 \))