Two adjacent angles on a straight line are\[x{}^\circ \]and\[(2x-27){}^\circ \]then \[x=\]?

Two adjacent angles on a straight line are\[x{}^\circ \]and\[(2x-27){}

1.	Two adjacent angles on a straight line are\[x{}^\circ \]and\[(2x-27){}^\circ \]then \[x=\]?
A.	\[57{}^\circ \]
B.	\[69{}^\circ \]
C.	\[77{}^\circ \]
D.	\[87{}^\circ \]
Answer» C. \[77{}^\circ \]