Answer:
x=4 and y=-4
Step-by-step explanation:
5x+2y=12
5x-2y=28
adding both equations
10x=40
x=4
now put x=4 for y in any of equation
5(4)+2y=12
20+2y=12
2y=12-20
y=-8/2
y=-4
you can do it by elimination method
