Question

x+y=2 & x-y=4 x=? & y=?

Answer 1

add both the equations

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

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

......................

2x=6

.....................

x=6/2

x=3

(now substitute the value of x in (2))

x+y=2

3+y=2

y=3-2

y=1

therefore, x=3 and y=1

hope this helps...