# The angles of a triangle are x – 40°, x – 20° and x + 15°. Find the value of x.

It is given that the angles of a triangle are x – 40°, x – 20° and x + 15°.

So, the angles be x – 15°, x and x + 15°

We know that the sum of the angles of a triangle is 180°.

x – 40° + x – 20° + x + 15° = 180°

3x – 45° = 180°

3x = 180° + 45°

x = 75°

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