Question

gauss jordan method!!!!!!!!! x+y - z + 2w = -20,
2x - y + z +w = 1, 3x - 2y + z - 2w = 27 what should i do first? :(

Answer 1

Multiply the first equation by -2 and add to the second equation.

Multiply the first equation by -3 and add to the third equation.

Answer 2

do you know how the identity matrix look s when theres 4 variables but three equations??

Answer 3

No such thing. You will likely have some dependency when you are done.

Answer 4

ok thanks