Question

Find the value of x if the three angles
of the triangle are (3x-20), 105 and
(2X-20)​

Answer 1

Answer:

x = 23°

Step-by-step explanation:

$\text{sum of three angles in a triangle = } 180 ^0 \\\\ (3x-20)+105+(2x-20)=180^0 \\ 3x-20+105+2x-20=180^0\\ 5x+65=180^0\\5x=180-65\\5x=115 \\ x=115/5 \\x=23^0$

Answer 2

Answer:

23

Step-by-step explanation:

(3x-20) + 105 + (2x-20) = 180

3x - 20 + 105 + 2x - 20 = 180

5x - 40 + 105 = 180

5x + 65 = 180

5x = 180 - 65

5x= 115

x = 115/5

x = 23