A number added to the difference between triple the number and thirteen

4x-13

Step-by-step explanation:

Let the number is x.

We know that triple of a number is 3 times that number i.e. 3x

The difference between triple the number and thirteen 3x-13

Now, we need to add a number to the difference between triple the number and thirteen. So, the expression can be written as :

x+3x-13 = 4x-13

Hence, the expression is  (4x-13).

a complex number is a number that can be expressed in the form a + bi, where a and b are real numbers, and i is a solution of the equation x2 = −1. because no real number satisfies this equation, i is called an imaginary number. has no real solution, since the square of a real number cannot be negative.