Answer:
x = 31°
Explanation:
The rightmost corner of the triangle is where we start.
We know that a line has 180° in it, therefore to find that angle, simply do:
180° - 153° = 27°
We also know that there are 180° in a triangle, write an equation for the triangle:
(2x-7)° + (3x+5)° + 27° = 180°
Combine like terms:
5x° + 25° = 180°
Subtract 25° from both sides:
5x° = 155°
Divide both sides by 5°:
x = 31°