so I have three equations with x, y and z and I need to solve for x, y and z.

The first equation is -x+y+4z
The second is x+3y+2z=4
The third is 2x+2y-3z=-7

How would I solve this problem?

Question

so I have three equations with x, y and z and I need to solve for x, y and z. 

The first equation is -x+y+4z
The second is x+3y+2z=4
The third is 2x+2y-3z=-7

How would I solve this problem?

anonymous · Answer

it so simple boy use the 3by3 matrix to solve it

anonymous · Answer

I came up with z = 13, but I can't figure out how to solve for x or y

anonymous · Answer

do u know how to use echelon form of matrix its really helping when u have to find x y z

anonymous · Answer

put z=13 in eq2 you will get 2x+2y-39=-7
x=32-2y/2 , z=13
now put values of x, z in any eq it will give value of y
then put y in x=32-2y/2 
you'll get x y z