solve the system
{-5x-y =21
{3x-4y+5z=-8
{-3x -z=12
a (-4,1,-1)
b (21,-8, 12)
c (4,-1,0)
d (-4,-1, 0)

Question

solve the system
{-5x-y   =21
{3x-4y+5z=-8
{-3x     -z=12
a (-4,1,-1)
b (21,-8, 12)
c (4,-1,0)
d (-4,-1, 0)

anonymous · Answer

this is hard

anonymous · Answer

you can eliminate y in the first equation and in the second equation. which will you leave an equation $$23x +  5z = -92$$

anonymous · Answer

it is matrices

anonymous · Answer

oh it should be in matrix form?

anonymous · Answer

that is in the format of the question but I need to know how to solve the system

anonymous · Answer

oh you can use it in the calculator if its in matrix form, press mode set up then press EQN then click anX + bnY + cnZ = dn. i can't remember on how to do it in a paper if it's in matrix form but i can show you if it is elimination and substitution technique. :) sorry

anonymous · Answer

thanks for the help

anonymous · Answer

hope this helps https://www.youtube.com/watch?v=woqq3Sls1d8

anonymous · Answer

it is answer D

anonymous · Answer

np :) the answer should be d.