Question

Two numbers have a sum of 11 and a difference of 10.

Answer 1

Answer:

X=10.5, Y = .5

Step-by-step explanation:

You set up 2 equations and then solve simultaneously.

X + Y = 11

X - Y  = 10

___________

Add these 2 equations together and you get:

     2X  = 21

So,   X = 10.5 and therefore Y must = .5