Question

X+Y = 10
Y-Z = 20
Z+X = ?

find the value​

Answer 1

x+y=10

y=10-x. eq. (1)

and,

y-z =20

10-x - z =20

-(x+z)= 20-10=10

Answer 2

Answer:

hey mate here is your answer

Step-by-step explanation:

x + y = 10

y = 10 - x

and

y - z = 20

10 - x - z = 20

-(x + z) = 20 - 10

= 10

Hope it will help you