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why do you think it's C ??

Accidentally clicked on it, didn't mean to

i mean B which is step 3

so that was a guess ?

Yeah I guess, I didn't really mean to click on it

Is it right? lol

i need explanation why did you pick ? and bec u that was an educated guess
let's start it ovr

Yeah I didnt evem mean to click on it, lets pretend i didnt click on that answer haha

so that's how multiply first equation by -2

|dw:1434568328568:dw|
multiply both sides by -2 let me know what you get :=)

4m =4 n+b?

-2 times -2 is -4

b how did you get b ??
-2(n+6) multiply everything which is inside the parentheses by outside term

for example a(b+c) = a times b +a times c :=)

Gah, I dont know! :(

-2 times n = ?
-2 times 6 = ?

-2 times 6 = -12

-2 times n = -2?

n can be written as 1n so multiply the coefficients -2 times 1n = -2n

now step is right or na ?

now step 2 is right or na ?

right

i mean wrong

Let me look at it for a sec lol

okay

Step 2 is wrong

how is it wrong ?

step 2 is right

yes |dw:1434568814335:dw|
now combine like terms

Gah, algebra is NOT my best class

|dw:1434569003073:dw|
COmbine like terms

just practice :=)

2m = 10n
2m = 16n

and so m equals 5 in the first equation and m equals 8 in the second?

|dw:1434569117690:dw|
combine them
-2m and 2m are like terms
so -2m +2m = ?

they cancel eachother

yes right !

:D

|dw:1434569214780:dw|
now combine these one

and why is it wrong ?

14n
16n

Never mind about the step 3 is wrong lol

it's okay tell me why do you think it's wrong ?

Step 4 is wrong, because it should be 10n and 16n!

they wrote âˆ’20 = 10n

we are still on step 3 :=)

|dw:1434569457564:dw|