Answer:
x=2 , y=6
Step-by-step explanation:
3.2x-0.4y=4 ...>1
-0.8x+0.6y=2 by multiply this equation in 4
-3.2x+2.4y=8 ...>2
by sum equation 2 + equation 1
-3.2x+2.4y=8
3.2x-0.4y=4
-------------------
0+2y=12
2y=12. y=6
by compensation in equation 1
3.2x-0.4y=4
3.2x-0.4*6=4
3.2x-2.4=4
3.2x=4+2.4
3.2x=6.4
(3.2/3.2)x=(6.4/3.2)
x=2
