One angle is 4x*
another one is (x+13)*
the another one is (3x-9)*
guess the x

x = 22

Step-by-step explanation:

4x + x + 13 + 3x - 9 = 180

8x + 4 = 180        Combine like terms

     - 4     - 4        Subtract 4 on both sides

8x = 176              Divide both sides by 8

x = 22

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.