Question

Solve the system of equations using matrices. Use Gaussian elimination with back-substitution.

3x + 5y - 2w = -13
2x + 7z - w = -1
4y + 3z + 3w = 1
-x + 2y + 4z = -5

Answer 1

these are my answers

Answer 2

4 variables, 4 equations..... you can solve each value...

Answer 3

not really but i can try

Answer 4

@Vocaloid would you like to try this one?

Answer 5

3x + 5y - 2w = -13 x=3

Answer 6

2x + 7z - w = -1 x=2

Answer 7

sorry x= -2

Answer 8

am i getting these right

Answer 9

@mathmate

Answer 10

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

Answer 11

no not like that.... i will solve it, wait....

Answer 12

ohh ok

Answer 13

you have to solve one equation for one varialble,
here2x=-13-5y+2w
now put this in second equation....
2x+7z-w=-1
=>-13-5y+2w+7z-w=-1

Answer 14

You have to do like this okay?

Answer 15

yeah im lost

Answer 16

@mathmate

Answer 17

is the answer a

Answer 18

suppose
x+y=15
and 2x+8y=10
we solve x and y.
same way we are solving 4 variables