Question

A.

56
°
B.
68
°
C.
112
°
D.
124
°

Answer 1

A.
`\displaystyle 56°`

Explanation:

180° = x° + [x + 68]°

180° = 68° + [2x]°

- 68° - 68°

__________________

`\displaystyle (112°)/(2) = ([2x]°)/(2) \\ \\ 56° = x`

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Answer 2

A. 56

Explanation:

Since a parallel line is 180 degrees, all we do is x + x+68 = 180.

2x = 112 or x = 56