The sum of four and the product of three and a number x.

4+3(x)

4+3x

The sum of four and the product of three and a number x can be written as the equation: 4 + 3x.

To find the sum of four and the product of three and a number x, you'll need to perform two operations: addition and multiplication.

First, you need to multiply the number x by three:
3 * x = 3x

Next, you need to add the result of the multiplication to four:
3x + 4

Therefore, the sum of four and the product of three and a number x is 3x + 4.