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11 votes
11 votes
The equation for the var
3n+ 8 = 5n - 4
n = [?]

User Ddomingo
by
2.5k points

1 Answer

16 votes
16 votes

Answer:

Explanation:

this is all about your algebra skillz, learn it , know it , live it :P

anyway

I'll make this very detailed , so you see the process. but lean it

3n+8 = 5n-4

begin using reverse operation order, note you need to know P.E.M.D.A.S , Parenthesis, Exponents, Multiplication, Division, Addition, Subtraction. starting from the "Parenthesis, and the working down thur each operation is forward operation order. I bet nobody has told you this before, huh. So to do the algebra on the equation above use reverse operation order.

so, I'm going to move the -4 , first

3n+8+4 = 5n-4+4 ( do the same thing on both sides of the equal sign)

3n+12 = 5n

now I'm going to move the 3n

3n+12 -3n = 5n -3n ( do the same on both sides again)

12 = 2n

now i'm moving up to Division, b/c it's next on our order of operations, i'll divide the 2 away from the n

12/2 = 2n / 2 ( same on both side again)

6 = n

now we have our answer for n, nice :P try this at home, school, or at your local coffee shop :P

User Chugreevd
by
3.0k points