Question

2x-3y-4z=-21 -4x+2y-3z=-14 -3x-4y+2z=-10

Answer 1

if you gone do it please show me how !

Answer 2

\[-3x+4y+2z = -10\]\[-4x+2y-3z = -14\]\[2x-3y-4z = -21\]

Answer 3

i need to find the value of x,y,z

Answer 4

Multiply the first equation by 2 and add it to the third equation. That will eliminate z

Answer 5

\[-6x+8y+4z = -20\]
\[2x -3y-4z = -21\]

Answer 6

ok

Answer 7

The result is -4x +5y = -41

Answer 8

Now multiply the top equation by 3 and the second equation by 2 and add. That will eliminate z again.

Answer 9

\[-9x+12y+6z = -30\]

Answer 10

\[-8x+4y-6z = -28\]

Answer 11

When you add those two you get:
\[-17x+16y = -58\]

Answer 12

So now you have two equations that contain only x and y.
Do you know how to solve that system?

Answer 13

yes thanks