To solve the inequality \( 4 + c \leq 10 \), we need to isolate \( c \).
- Subtract 4 from both sides:
\[ c \leq 10 - 4 \]
- Simplifying this gives:
\[ c \leq 6 \]
So, the solution to the inequality is \( c \leq 6 \). This means \( c \) can be any number less than or equal to 6.