Two complex numbers are equal when their real and imaginary parts are respectively equal.

**Example**

Determine **x** and **y,** so that:

**(2x + y) + 6i = 5 + (x + 4y) i**.

*Resolution*

Two complex numbers are equal when their real and imaginary parts are respectively equal.

**Example**

Determine **x** and **y,** so that:

**(2x + y) + 6i = 5 + (x + 4y) i**.

*Resolution*