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5x + 2 (x+7)

14 because 5+2=7 so x=7 and 7+7=14

Answer: 7x + 14

Step-by-step explanation:

5x + 2 (x + 7)

First, we use distributive property to distribute the 2 to the x and the 7. We're left with this expression:

5x + 2x + 14

We can combine 5x and 2x to get 7x

7x + 14

We cannot do anything else with this expression and it is thus is simplest form.