Question

What’s the value of X?

Answer 1

x = 10

Explanation:

7x + 12 + 9x + 8 = 180

16x + 20 = 180

16x = 160

x = 10

Answer 2

x = 10

Explanation:

Adjacent angles add to 180 degrees, so set the angles equal to 180

(7x + 12) + (9x + 8) = 180

- 12 - 12

7x + (9x + 8) = 168

- 8 - 8

7x + 9x = 160

16x = 160

/16 /16

x = 10