Question

-4n+7+2n=1
n = 2.666666667 (this is what i got and i dont think it is right, none of my choices are decimals

Answer 1

\(\large\rm -4n+7+2n=1\)
Subtracting 7 from both sides gives us
\(\large\rm -4n+2n=1-7\)
Then combine like terms,
\(\large\rm -2n=-6\)

Any confusion on those two steps?

Answer 2

so the answer would be -6 ??

Answer 3

No, at this point we've solved for -2n, not n.

Answer 4

To undo the 7 being `added` to our n,
I `subtracted` 7 because that's the opposite of addition.


n is being `multiplied` by -2.
How do you undo multiplication?

Answer 5

What's the opposite of multiplication?

Answer 6

division

Answer 7

wait, what am i gonna divide by ?

Answer 8

Good.
Since n is being multiplied by -2,
we can undo that operation by division by -2.

Answer 9

\[\large\rm \frac{-2n}{-2}=\frac{-6}{-2}\]On the left side of the equation,
the multiplication of -2,
and division of -2
undo one another,\[\large\rm n=\frac{-6}{-2}\]

Answer 10

i am really confused.... how do i divide n ?

Answer 11

You're dividing -2n by -2.
Just divide the number in front of n by the number in the bottom.\[\large\rm \frac{-2n}{-2}\quad=\frac{n}{1}\]-2 divided by -2 is 1.
So that leaves us with n/1 or simply n.

Answer 12

oh oh oh i should have knew that