Let's start at the beginning.

You know that 7 times 6 is 42, right ?

So, if I said 7 times "y" is 42, could you tell me what "y" is? (In algebra the letter "x", "y", etc just means "don't know this yet")

It would be written neatly like this:

7y=42

And you solve it like this:

7y=42

7y / 7 = 42 / 7 (you can divide by anything, so long as you do it to both sides of the "=")

y=42 / 7 (7/7 = 1 of course)

y=6 (42/7 = 6)

Is this too easy?