Answer :

rabinshrestha41
      63 = -3 (1 - 2n)
Distribute on the R.H.S
      63 = -3 + 6n
63 + 3 = 6n
      66 = 6n
 66 / 6 = n
      11 = n
        n = 11
kittymaniac
Make sure that whatever you do to one side you also do to the other. It's also important to remember the distributive property: a(b + c) = a*b + a*c.
Also, the aim here is to isolate n.

-3*(1 - 2n) = 63
-3(1) - (-3)(2n) = 63      | Distributed the -3 through the parentheses
-3 + 6n = 63
-3 + 6n + 3 = 63 + 3     | Added 3 to both sides
6n = 66
6n /6 = 66 /6        | Divided both sides by 6
n = 11

Hope this helps! :)

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