60, 60 and 60 degrees
There are two criteria: the angles have to all be equal and they have to add up to 180 degrees. This answer satisfies both criteria.
X-4=-11
move -4 to the other side
to get X by itself
sign changes from -4 to +4
X-4+4= -11+4
X= -11+4
Answer:
X= -7
This is the commutative property of addition. It basically says, x+y=y+x.
To answer your question, 103+21=21+103
it would still be 29 bc it fliped around but it has to eqaul to the right angle
