Answer:
John scored 20 goals he attempted 28.
Explanation:
Given:
John scored 5:7 of the goals he attempted at the soccer game.
During three games, if John scored 20 goals.
Now, to find the number of attempts.
Let the number of attempts be

The number of goals = 20.
As, given John scored 5:7 of the goals he attempted at the soccer game.
So, 5 is equivalent to 7.
Thus, 20 is equivalent to

Now, to solve by using cross multiplication method:

By cross multiplying we get:

Dividing both sides by 5 we get:

Therefore, he attempt 28.