Question

solve!
by any method following pairs of eqn
​

Answer 1

Answer:

Solution:

x= 2

y=-1

z=1

Step-by-step explanation:

Given equations are

x-y+z=4...................(1)

x+y+z=2..................(2)

2x+y-3z=0...............(3)

Adding (1) and (2)

x-y+z=4...................(1)

x+y+z=2..................(2)

$\implies$2x+2z=6........(4)

Adding (1) and (3)

x-y+z=4...................(1)

2x+y-3z=0...............(3)

$\implies$3x-2z=4............(5)

2x+2z=6...........(4)

3x-2z=4............(5)

Adding (4) and (5) we get

5x =10

$\implies$x=2

put x=2 in (4)

2(2)+2z=6

2z=6-4

2z=2

z=1

put x=2 and z=1 in (2)

2+y+1=2

y=-1

Solution:

x= 2

y=-1

z=1