Question

1. twice the sum of a number and negative seven

Explanation:

Step1: Define the unknown number

Let the number be $x$.

Step2: Write the sum with -7

Sum of $x$ and $-7$: $x + (-7) = x - 7$

Step3: Multiply the sum by 2

Twice the sum: $2(x - 7)$

Answer:

$2(x - 7)$