Question

evaluate $5(3 + x)$ when $x = 1$. $5(3 + x) = 5(3 +?)$

Explanation:

Step1: Substitute x with 1

We know that \( x = 1 \), so we substitute \( x \) in the expression \( 5(3 + x) \) with 1. So we get \( 5(3 + 1) \). First, for the box, we need to put the value of \( x \), which is 1.

Step2: Calculate the result (optional for the box, but to check)

First, calculate inside the parentheses: \( 3+1 = 4 \). Then multiply by 5: \( 5\times4=20 \). But the question here is about the box, which is the value of \( x \) to substitute.

Answer:

1