The value of x in the diagram is x = 33.
How to find the value of x?
We know that the sum of the interior angles of any triangle is always equal to 180°, then here we can write the equation:
45 + (3x + 3) + x = 180
Let's solve this for x, we will get:
45 + 3 + 3x + x = 180
48 + 4x = 180
4x = 180 - 48
4x = 132
x = 132/4
x = 33