To simplify the expression 7 + 3x + 4, we begin by combining like terms. In this case, the constant numbers 7 and 4 can be added together.
So, we perform the addition:
- 7 + 4 = 11
Now we can rewrite the expression with this result:
11 + 3x
Thus, the simplified form of the expression 7 + 3x + 4 is 3x + 11.