-5x+y-4z=60

2x+4y+3z=-12

6x-3y-2z=-52

solving a 3 variable linear system

Question

-5x+y-4z=60

2x+4y+3z=-12

6x-3y-2z=-52

solving a 3 variable linear system

andriod09 · Answer

wow. all you have to do is add them i believe.

anonymous · Answer

well my math teacher said to use elimination using two different sets of the 3 so i did but i got z as a decimal and he said all the variables were whole numbers so idk what to do

andriod09 · Answer

add 2 of them, so you cab get the better of the 2, then you substitute the vaiable in the last equation.

anonymous · Answer

okay ill try, thanks

anonymous · Answer

@kirstenande this was along question!!!


i got::: 

x=-8
y=4
z=-4

andriod09 · Answer

greek, it should be y=5 not 4.

anonymous · Answer

@andriod09  substitute all of my values back into one of the 3 eqns.... LHS=RHS

anonymous · Answer

@kirstenande U getting it???

andriod09 · Answer

ohhh fail.

anonymous · Answer

@andriod09 :P

anonymous · Answer

i just re did it and when i got it down to the two equations with two variables i got 
22x+19z=-252
-9x-14z=128

anonymous · Answer

i just re did it and when i got it down to the two equations with two variables i got 
22x+19z=-252
-9x-14z=128

anonymous · Answer

|dw:1349115063770:dw|

first matrix