Question

x + y -z = 2, x - 2y + z = 3, 2x - y - 3z = -1 (Solve by cramer's method)

Answer 1

Step-by-step explanation:

x+y-z=2

x+y-2=z 1st equation

x-2y+z=3 2nd equation

substitute z value

x-2y+x+y-2=3

2x-y=5

2x-y-3z=-1

we know 2x-y=5

so 5-3z=-1

3z=6

z=2

from 1

x+y=4

from 2

x-2y=1

equation 1-2

3y=3

y=1

substitute x value in equation 1

x+1=4

x=3