Question

What is the value of x? 19x-90 V 12x+500 8x+690 U

Answer 1

We know that the summ of all angles should be equal to 360 so:

`55+8x+69+19x-9+12x+50=360`

and we solve for x so:

`\begin{gathered} 39x=360-165 \\ x=(195)/(39) \\ x=5 \end{gathered}`