Question

x+y=18, x-y=2
please tell the answer

Answer 1

let x+y=18 --(1) and x-y=2--(2)

Add (1) and (2), you will get 2x=20

so x=20/2=10

Put x=10 in equation (1)

10+y=18

y=18-10

y=8

there you go!

x=10, y=8

Answer 2

adding both equation we get
2x=20
x=20/2=10
and now putting value of x in equation 2
we get
y=18-10=8
x=10 y=8