To solve for the value of each angle given that ∠1 and ∠3 are a vertical pair and their sum is equal to 68°, we can set up the equation based on the information provided. Since ∠1 and ∠3 are equal in measure (as they are vertical angles), we can express this relationship mathematically.
Let \( x \) be the measure of each angle. Then we have the following equation:
\[ x + x = 68° \]
This simplifies to:
\[ 2x = 68° \]
So the correct equation that solves for the value of each angle is:
2x°=68°
Thus, the answer is 2x° = 68°.