To find the equation that will solve for \( x \), we need to identify the relationship between the angles based on their positions. Given that \( m∠5 = 112° \) and \( m∠8 = (2x + 8)° \), we can use the fact that \( ∠5 \) and \( ∠8 \) form corresponding angles with the transversal (the slanting line) intersecting the two parallel lines.
Since the lines are parallel, corresponding angles are equal. Thus, we can set up the equation:
\[ m∠5 = m∠8 \]
Substituting the values we have:
\[ 112° = 2x + 8° \]
To solve for \( x \), rearrange the equation:
\[ 2x + 8 = 112 \]
Subtract 8 from both sides:
\[ 2x = 112 - 8 \]
\[ 2x = 104 \]
Now divide by 2:
\[ x = 52 \]
Therefore, the equation you would set up to solve for \( x \) is:
\[ 112° = 2x + 8° \]
So the finalized form of the equation is:
\[ 112° = (2x + 8)° \]
This equation can be directly used to find the value of \( x \).