Im just about to work one out for you and you just do the same on the rest
Answer: yes
Step-by-step explanation:

Divide by 3 on both sides:

Square root both sides:

Take away 3 from both sides:

Divide by 2 on both sides:

Answer:
Answer:
a: always, always
b. always, always
c. never, would not, never
Step-by-step explanation:
I hope this is right (i tried)
Sum means addition
negative 18 means -18
a number can be x
Sum of negative 18 and x should be 11
thus the equation is