Answer:
3 × (x + 7)
three × (a number, commonly x + 7)
3 * (7 + n)
Step-by-step explanation:
Three times - '3 *'
The sum of a number and 7 - '(7 + n)'
"Three times the sum of a number and 7” would be '3 * (7 + n)'.
Hope this helps.