Question

What is the value of n in the equation 3n + 2(n + 2) = 9n + 12?

I need help explanations step by step.

Answer 1

This thing ill explain it beettte :P http://mathpapa.com/algebra-calculator.html

Answer 2

\[ 3n + 2(n + 2) = 9n + 12? \] step by step right?

Answer 3

ready?

Answer 4

yes

Answer 5

distribute the 2 first for the \(2(n+2)\) part
what do you get/

Answer 6

4?

Answer 7

oh no lets go slow

Answer 8

your answer has to have an \(n\) in it
\[2(n+2)=2\times n+2\times 2\] by the distributive law

Answer 9

we would write that as \[2(n+2)=2n+4\]

Answer 10

start with \[3n + 2(n + 2) = 9n + 12\] next we have \[3n+2n+4=9n+12\]
next step is to combine like terms on the left

Answer 11

5n+4=9n+12

Answer 12

and then i subtract 5n from both sides right?

Answer 13

yes

Answer 14

ok would that be 4=9n+12−5n?

Answer 15

yes, but you probably want to subtract \(9n-5n\) instead of writing it like you did

Answer 16

what is \(9n-5n\)?

Answer 17

4n

Answer 18

right so \[4=4n+12\]

Answer 19

next step?

Answer 20

8+12n

Answer 21

ok no

Answer 22

i said that wrong
the n in on the RIGHT you want the number on the LEFT
subtract 12 from both sides

Answer 23

\[4=4n+12\] subtract \(12\) what do you get?

Answer 24

-8=4n right?

Answer 25

yes

Answer 26

now divide both sides by \(4\) to get \(n\) by itself

Answer 27

-8/44=n

Answer 28

oops i mean -8.4=n

Answer 29

not 44, just 4
\[\frac{-8}{4}=n\]

Answer 30

what is minus 8 divided by 4?

Answer 31

lol sorry i am gettin this wrong i ment t write that lol sorry

Answer 32

what number is it?

Answer 33

-2

Answer 34

bingo

Answer 35

ok thank you very much!! <33333 btw why did ur ss go from 100 to 99?

Answer 36

i got hacked apparently

Answer 37

oh dats sad. i noticed though

Answer 38

i will get it back