Question 84335

X+Y=9---------------------------Equation #1
X-Y=3----------------------------Equation #2

First we will add Eq1 and Eq2 and we get

X+X+Y-Y=9+3  collect like terms

2X=12  divide both sides by 2
X=6  substitute 6 for X in Eq1 and we get:

6+Y=9  subtract 6 from both sides
6-6+Y=9-6  collect like terms

Y=3

So are answer is:

X=6, Y=3

CK

Substitute the values of X and Y into eq 1
6+3=9
9=9
Now substitute the values of X and Y into eq 2
6-3=3
3=3

Hope this helps----ptaylor