Question

find the sum of x+y=10 , x-y=2

Answer 1

x-y=2

x=2+y    

Put in (x+y=10)

2+y+y=10

2y+2=10

2y=10-2

2y=8

y=8/2

y=4

Put in (x+y=10)

x+4=10

x=10-4

x=6

y=4