We need to find the number that makes the ratio $x:1$ equivalent to $77:7$.

1. Problem Description

We need to find the number that makes the ratio $x:1$ equivalent to $77:7$.

2. Solution Steps

We are given the ratio $77:7$. We want to find an equivalent ratio of the form $x:1$.

To do this, we can divide both sides of the original ratio by

7.

$\frac{77}{7} : \frac{7}{7}$

$11 : 1$

Therefore, $x = 11$.

3. Final Answer

$11$