Answer:
30
Step-by-step explanation:
(–23) – 45 – (–98)
According to PEMDAS, we do addition and subtraction from left to right
-23 -45 = -68
-68 - (-98)
Subtracting a negative is like adding a positive
-68+ 98 = 30
80°
Three angles are equal
Let the equal angle be x
3x+120=360
3x=240
x=240/3
=80
Hence the three angles are 80∘
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