Question

X + Y + Z = 36
4X + 2Y + Z = 71
6X + 5Y + 4Z = 86 HELP!! System of equations.

Answer 1

have you tried the elimination method?

Answer 2

I'm really honestly confused with this...

Answer 3

the elimination method?

Answer 4

Yes, how do I do that?!

Answer 5

it's fun. first pick a variable you want to KILL

Answer 6

I'm taking online classes but it doesn't explain how to do it...

Answer 7

i will show you. choose a variable you want to eliminate. ANY ONE.

Answer 8

KILL THEM ALL!

Answer 9

Ahh, thank's! x?

Answer 10

DIE!

Answer 11

tired matrix method?

Answer 12

Let's kill 4x, it will be easier. here's why:

in order to eliminate 4x, all we have to do is multiply the top equation by -4. if we do that, we're left with

-4x -4Y -4Z = -144

+

4x + 2Y +Z = 71

Now add these two equations

Answer 13

Will do! So, together I got.... x-2y-3z=-73. Not sure if it's correct.

Answer 14

Is that how you do it?

Answer 15

close, -4x + 4x = 0, s the x variable is gone now

Answer 16

Oh, well that wasn't close enough. :(