Answer:
x = 12°
Step-by-step explanation:
In the image you know of 3 angles. The two interior angles and the overall angle.
Angle 1 - (x + 42)°
Angle 2 - 3x°
Both of these angles are inside the overall angle which is a right angle. A right angle is also equal to 90°. This means that the equation would be:
x° + 42° + 3x° = 90
The x°s can combine because they are like terms to create:
4x° + 42° = 90
Then we can subtract 42° from both sides to get:
4x° = 48°
Then we can divide by 4 from both sides to get:
x = 12°
