We have been given that Vonna scored 35 goals at soccer practice. Her ratio of goals to misses was 7:6.
Let x be number of misses of Vonna at soccer practice. We can set up a proportion of goals to misses as:

Upon substituting number of goals in our proportion we will get,

Upon cross multiplying our equations we will get,
Let us find
Upon dividing both sides of our equation by 7 we will get,


Therefore, Vonna missed 30 times at her soccer practice.