To find the value of \( x \) given that \( x° + 47° + 273° = 360° \), we can set up the equation:
\[ x + 47 + 273 = 360 \]
First, combine the known angles:
\[ 47 + 273 = 320 \]
Now substitute this back into the equation:
\[ x + 320 = 360 \]
Next, subtract 320 from both sides to isolate \( x \):
\[ x = 360 - 320 \] \[ x = 40 \]
Thus, the value of \( x \) is:
\[ \boxed{40°} \]