how does one do a problem like this?

Question

okay, solving equations by multiplying and dividing -
n/3 - 4 = 1

Answer 1

On these, try to get your numbers on one side of the equation and your variable (in this case, N) on the other,

n/3 - 4 = 1
(add 4 to both sides)
n/3 -4 +4 = 1 +4
n/3 = 5
Multiply through x 3
3( n/3) = 5x3
n = 15

Answer 2

You can solve this equation by multiplication or division because multiplication and division are the opposite of each other. In other words, they are reversed math operations.

Your question is read:

THE FRACTION (N DIVIDED BY THREE) MINUS FOUR EQUALS ONE.

When you face a fraction equation like this one, your first step should be to remove the fraction by multiplying each term by the lowest common denominator or LCD.

(n/3) - 4 = 1

I will multiply each term by our denominator, which in this case happens to be 3. See it?

So, (n/3) times 3 -4 times 3 = 1 times 3.

This becomes:

n - 12 = 3

See what I did?

Now, this equation is one WITHOUT the fraction.

Simply move -12 over to the other side of the equation. This will make -12.... +12. Know why?

Final answer: n = 15.

You can check by plugging 15 into the orginal equation. If you get the same answer on BOTH sides of the equation, you know that n = 15 is the right answer.

Let's see:

n = 15, right?

So, (15/3) - 4 = 1

15 divided by 3 = 5

We now have 5 - 4 = 1

We now have 1 = 1.

You see, my answer n = 15 is the right answer.

Guido

Answer 3

Okay, well basically you want to try as hard as you can to get n on one side by it's self

So you have n/3 - 4 = 1 right? so get rid of the four. now you have minus four and you want zero so when you have minus something you have to add the same amount...ie

n/3 -4 (+4) = 1 (+4)
Because what you do on one side you have to do on another
n/3 = 5
next you want to get rid of the 3 now because you are dividing the n by 3 you want to do the opposite (in other words to get rid of a division multiply) so multiply by 3
n/3 (x3) = 5 (x3)
again on both sides
n = 15
there you go. just isolate the variable (ie the letter)
Hope that helps... Music

Answer 4

subtract 4 from both sides,since you are adding 4.then you have n/3 = 5.now multiply by 3 on both sides.your answer should be 15

Answer 5

you want to get the n by itself, but the equation needs to stay equal.

n/3 = 1 + 4
n/3=5
n= 5 X 3
n=15