Hi, diana, li'l girl!
Here is one way. The "isolate" way.
So, to find the unknown, isolate it in one side of the equation. By itself, alone, no attachments.
6 = a/7
See that the unknown "a" has a 7 as its denominator. To isolate the "a", remove that denominator 7 from "a".
a/7 means "a divided by 7", so to clear or eliminate or remove 7 from "a", you multiply both sides of the equation by 7. Thus,
6*7 = a/7 *7
42 = a
or.
a = 42 ---------------answer.
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w/12 = 2
w has that 12 under it. That 12 divides w by 12. To clear w of that 12, multiply both sides by 12.
w/12 times 12 = 2 times 12
w = 24 ----------------------answer.
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If I confused you instead, sorry, diana.