To find the value that correctly fills in the blank so that the expressions are equivalent, we need to first simplify both sides of the equation.
Starting with the left side:
\[ 42 + 70 = 112 \]
Now we analyze the right side of the equation:
\[ 6 + 10 = 16 \]
Now, we want to find \( x \) such that:
\[ 112 = x(16) \]
To solve for \( x \), we can rearrange the equation:
\[ x = \frac{112}{16} \]
Calculating \( \frac{112}{16} \):
\[ x = 7 \]
Thus, the value that correctly fills in the blank is:
7