Answer:
2x+1200
Step-by-step explanation:
First remember that SUM is the addition of two things
You can rewrite the unknown "number" as (x)
You can rewrite the entire phrase as:
2(x+600)
Now use Distributive property to simplify the phrase. It should look like this:
2x+1200
You cannot simplify this anymore, giving you the final answer of 2x+1200
