question_answer

The angles of a triangle are\[(x+{{10}^{o}}),\,\,(x+{{40}^{o}})\]and\[(2x-{{30}^{o}})\]. What is the value of\[x\]?

A) \[{{30}^{o}}\]                        

B) \[{{40}^{o}}\]            

C) \[{{20}^{o}}\]            

D)        \[{{10}^{o}}\]