Question

Please help... been stuck on this question forever!!
Solve 9x + 5y + 3z = 4
6x + 2y + 4z = 2
-3x + 3y – 7z = 2

Answer 1

(-1, 2, 1)

(1, -1, 0)

(4, 2, 2)

(1, 2, -5)

Answer 2

and please explain how you did it....so i can do another questions myself :)

Answer 3

we can do this by the elimination method
First multiply the 3rd equation by 3
and add it to the first equation
so we get

-9x + 9y - 21z = 6 ( 3rd one * 3)
9x + 5y + 3z = 4 ADD:
14y - 18z = 1o

we have eliminated the term in x

understand so far?

Answer 4

omg!!!! thank you thank you!!!! helped sooo faar!!

Answer 5

yw

Now the next step is to get another equation in x and y only

We can do this by multiplying the 3rd equation by 2 and then adding it the the second equation

can you try doing that?

Answer 6

@welshfella so i the answer (4,2,2)... i guess...omg i am lost...i feel like a dumb person :(
gosh i am really bad at systems of equations :<