Question

x+y=7 , y+z=8 & z+x=9 then x =​

Answer 1

Step-by-step explanation:

x+y=7

y=7-x -----1.

y+z=8. [put value of y from 1. equation]

7-x+z=8

z-x=8-7

z-x=1

z=1+x. ------2.

z+x=9. [put value of x from 2. equation]

1+x+x=9

1+2x=9

2x=9-1

2x=8

x=8/2

x=4

Answer 2

Answer:

x+y=7

y =7-x–––eqn.1

y+z=8

put eqn.1 in this

so

7-x+z=8

7+z-8=x–––eqn.2

z+x=9

from eqn.2

z+7+z-8=9

2z -1=9

2z=9+1

z=10/2

z=5

by z value we can find value of x by eqn.2

7+5-8=x

7-3 =x

x=4

by eqn.1 y equals

y=7-x

y=7-4

y=3

so x=4,y=3 & z=5

i hope u got that