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what row by column matrix is this?

1 x 3 for both

so is A - [-8 -14 2x] and B =[2 -74 -6]?

it's like find an x that will make both matrices equal...

I have done these, but with 2x2 or above

I could give you the possible answers if that would help?

a. x = -5.7
b. x = -17.7
c. x = 7
d. x = 6

yes please

what the O_O!

Yeah...my reaction exactly.

this is so weird.. I'm calling wolfram lol

T_T wait a sec.. I might have ... did you do the operation in paraenthesis first?

Question: how A = B??

that's what I was thinking too.

if A = B ,then -8 =2??
-14 =-74
-2x = -6 but how??

something is wrong with the arithmetic.

That wouldn't surprise me. I've been doing math since about 10 am.
and yes it is.

\[[-8, -14,-2x] - ([-19 , 17 , -1] + [14, 13 ,-2]) = [-3, -44, -9]\]

let me put on my cglasses

now let's do the ones in the () with adding the matrices.

\[- ([-19 , 17 , -1] + [14, 13 ,-2]) \]

\[- ([-19+14 , 17+13 , -1-2] )\]\[-[-5,30,-3] \rightarrow [5,-30,3]\]

\[[-8 -14-2x] - [5, -30, 3] \rightarrow [-8-5-14-(-30),-2x-3]\] are you sure it's not
[8, -14, 2x] ?

yay I think I got what x is !

on the last entry we have to solve for x so now we have
\[ [3, 44, -2x-3] = [3, 44, 9]\]

Really?
(sorry, I'm doing this an something else at the same time)

wait a sec... I think there are typos

I think.. let me do this on paper.. there is a typo somewhere on your end or something.

Okay.

-_- I got x = 3. who are these people giving these choices anyway?

\[[-8, -14, 2x] +[ 5 -30 ,3] = [-8+5, -14-30, 2x+3] = [-3, -44, 2x+3]\]

yup x = -6 \[[-3, -44, 2(-6)+3] = [-3, -44, -12+3] = [-3, -44, -9]\]

-2x+3 = -9
doh I dropped a sign. It's D
-2x = -9-3
-2x=-12
x=6

that question sucked... I was never given like this and I'm used to adding vertically!

Honestly, I've never had one like this either. The moment I looked at it, my brain went blank.