Question

solve systems of equations; x-y =6 (1)
3x -8z =24 (2)
3y+z =6 (3)

Answer 1

left hand side is 3 X 3 matix , call it A
make equation like AX=B ..OK

Answer 2

X=A^-1 * B

Answer 3

A= 1 -1 0
3 0 -8
0 3 1

Answer 4

X= x
y
z

Answer 5

B= 1
2
3

Answer 6

x = 1 -1 0 * 1
y 3 0 -8 2
z 0 3 1 3

Answer 7

x= -1
y= -21
z= 9