Question

Please help Please Look at the screen shot below

Answer 1

As the sum of the angles on a line sharing a same vertex is equal to 180°.

3x + 45° + 90° = 180°

or, 3x + 45° = 180° - 90° = 90°

or, 3x = 90° - 45° = 45°

or, x = 15°

The value of x is 15° .