Question

I need help on solving three system of equations, and finding the three variables. I also need to know the steps of doing it. using Elimination
-3x+3y+4z=0
-3x-y+z=-3
3x+4y+4z=5

Answer 1

I really need help...:(

Answer 2

the easiest thing to do is add the 1st and last equations
then 2nd and last equations....

this will eliminate x and give you 2 equations in 2 unknowns.

-3x + 3y + 4z = 0 Equation 1
-3x - y + z = -3 Equation 2
3x + 4y + 4z = 5 Equation 3

so Equation 1 + Equeation 3

-3x + 3y + 4z = 0
3x + 4y + 4z = 5
------------------
7y + 8z = 5 Equation 4


repeat the process, Equation 2 + Equation 3


-3x - y + z = -3
3x +4y + 4z = 5
---------------
3y + 5z = 2 Equation 5



so you now have 2 equations in 2 unknowns


7y + 8z = 5
3y + 5z = 2


you will need to choose a letter to eliminate and carry out the appropriate multiplication and addions/subtractions.

Answer 3

Thanks fot help

Answer 4

So what are the three variables are