My answer would have to be:
30 : 54
Answer:
69
Step-by-step explanation:
as , 77+x = 146(external angle) , so x = 146 - 77
so x = 69
Answer: 63
PEMDAS
Answer: x = 10
-x = 9
Whenever there's a negative number you always know there's a 1 in front of the x
-1x =9
+1 +1
equals x= 10