Question

X - y = 11
2x + y = 19

Answer 1

(10,-1)

Explanation:

x - y = 11

2x + y = 19

Add the two equations together to eliminate y

x - y = 11

2x + y = 19

-----------------------

3x = 30

Divide each side by 3

3x/3 = 30/3

x = 10

Now find y

2x+y =19

2(10) +y = 19

20+y = 19

Subtract 20 from each side

20-20 +y = 19-20

y = -1