How do you write twice the sum of seven and a number

2 (7 + n)

Step-by-step explanation:

2 (7 + n)

For this equation you need to put parenthesis to show that you need to add, then multiply.

Hope this helps! :)

I believe to do this, you would write the eqaution 2(7+x).

The question says twice the sum (addition) of 7 and a number. The x takes the place of a number. Putting it all together we get 2(7+x).

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if you are saying purchasing 3 social media ads and one newspaper ad counts as one purchase then there are:

6 purchases

if you are asking how many of each then:

18 social media ads

6 newspaper ads