5/6 ( 4 1/5х — 1 1/5у) — 5 2/5( -2/9х — 1 1/2у) =
= 5/6 (21/5х — 6/5у) — 27/5(-2/9х — 3/2у) =
= 7/2х — у + 6/5х + 8,1у = 7/2х + 6/5х + 7,1у =
= 3,5х + 1,2х + 7,1у = 4,7х + 7,1у
5/6 ( 4 1/5х — 1 1/5у) — 5 2/5( -2/9х — 1 1/2у) =
= 5/6 (21/5х — 6/5у) — 27/5(-2/9х — 3/2у) =
= 7/2х — у + 6/5х + 8,1у = 7/2х + 6/5х + 7,1у =
= 3,5х + 1,2х + 7,1у = 4,7х + 7,1у