Question

9x - 4y= 19
4x + 4y= 20

Answer 1

x=3 and y=2

Explanation:

9x - 4y= 19

4x + 4y= 20

add both equations;

13x = 39

x= 3

using 4x + 4y= 20;

4(3) +4y=20

12+4y=20

4y= 20-12=8

y=8/4=2