To find the total number of toys Sally has, we can add the number of each type of toy together. Let’s denote:
- The number of stuffed animals as \( S = 4 \)
- The number of puzzles as \( P = 6 \)
- The number of balls as \( B = 7 \)
The equation to find the total number of toys \( T \) can be written as:
\[ T = S + P + B \]
Substituting the numbers into the equation:
\[ T = 4 + 6 + 7 \]
Now, we can solve the equation step by step:
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First, add the stuffed animals and puzzles: \[ 4 + 6 = 10 \]
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Next, add the result to the number of balls: \[ 10 + 7 = 17 \]
So, the total number of toys Sally has is:
\[ \boxed{17} \]