Question

Find the value of x.
3x +7
D
2x + 7
3x 16

Answer 1

x = 20

Explanation:

According to angle sum property of a triangle , sum of all the angles in a triangle is equal to 180°.

So,

`(3x + 7) + (2x + 7) + (3x + 6) = 180`

`= > 8x + 20 = 180`

`= > 8x = 180 - 20 = 160`

`= > x = (160)/(8) = 20`

Answer 2

sum of interior angle of a triangle is 180 degree

so,

3x +7 + 2x+7 +3x+6 = 180

8x + 20 = 180

8x = 180 - 20

8x = 160

x = 160/ 8

x = 20

May it will help you