Angles of a triangle

Question

Solve this exercise using the fact that the sum of the measures of the three angles of a triangle is

180degrees°.

In a​ triangle, the measures of the three angles are​ x,

x minus 21x−21​,

and

x plus 6x+6.

What is the measure of each​ angle?

Question content area bottom

Part 1

The measure of the first​ angle, x, is

6262degrees°.

Answer 1

x + (x-21) + (x+6)

= 3x - 15 = 180

x = 195/3= 65 degrees

x-21 = 44 degrees

x+6 =71 degrees

65+44+71=180

Answer 2

The three angles are x, x-21, and x+6. The sum of the three angles equals 180:

x + x-21 + x+6 = 180

Solve for x.