Answer:
Step-by-step explanation:
Group like terms 6y-2y= 2-1-2
When a number goes over the equal sign= positive + changes to negative, vice versa.
So final answer is 4y= -1= -4y
Because 4 is decided by -1
I’m pretty sure it would be angle 3 and angle 5 and then angle 1 and angle 7
Answer:

Step-by-step explanation:

♨Rage♨
Answer:
12
Step-by-step explanation: