75°+75°=150°
angles in a triangle add up to 180°
180°-150°=30°
c) x=30°
Answer:
if
and
.
Step-by-step explanation:
We are given
and
.
We are asked to find
.
means 

You only have one pair of like terms, that is the constants.


2 +2 = 4 . The answer is 4.