Question

Asked Apr 14, 2019

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Solve the system

5x-4y+6z=-25

9x+2y-3z=-68

3x+y=-28

(x,y,z)=

Step 1

The given equations are,

5*x* –4*y* +6*z* = – 25 ……(1).

9*x *+ 2*y *– 3*z* = – 68 …….(2).

3*x* + *y *= – 28 ……(3).

Step 2

Use the equations (1) and (2) to eliminate *z* as follows.

Step 3

Substitute *x* = –7 in (3) ...

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