where did you get the -2.2 from, how did it suddenly appear, was there more info in the question?

5x – 2y = -5 .......................(1)

y – 5x = 3 ..........................(2)

from (2), we see y = 5x + 3, substitute 5x + 3 for y in (1)

=> 5x - 2(5x + 3) = -5

=> 5x - 10x - 6 = -5

=> -5x = 1

=>x = -1/5

but y = 5x + 3

=> y = 5(-1/5) + 3

=>y = 2