Answer:

Step-by-step explanation:

The name of this property is symetric property of equality
Answer:15x+7
Step-by-step explanation:
First you would see that the -(-10x+6) would turn into 10x+6 meaning that the whole equation would turn into 5x+1+10x+6. Then add the x numbers together and the whole numbers separate. So now your answer should be 15x+7
Answer:
9
Step-by-step explanation:

I^22 equals to -1 since i^2 is negative one