Question

Простятское: 5/x-8/5x при х=-2

Answer 1

5/x-8/5x =  (25 - 8)/5х = 17/5х
х = -2
17/5*(-2) = 17/(-10) = -1,7

Answer 2

-5/2+8/10=(-25+8)/10=-17/10=1.7