Answer:
2x + y = 12 = x + y = 6
Step-by-step explanation:
2x + y = 12
divide 2 by 12
x + y = 6
this os all I really under stand lol sorry!
Answer: 
Step-by-step explanation:
Let the smallest angle be x.
Then, the middle angle is x+30.
The largest angle is 2x+30.
Angles in a triangle add to 180 degrees, so:

So, the angles measure 
Answer:
5x= 76.5-1.5
So, m=15m
Step-by-step explanation:
Answer:
3x18 = 3 (10+8) is an example of the commutative property of multiplication
Step-by-step explanation:
Answer:
try multiplication
Step-by-step explanation: