Упростите выражение: 1) 5/8х-(1\4х-1\12у)+1\3у= 2)9,4х+(2х-11целых 3/4у)-3целых 5\9у=

Раскроем скобки и приведем сходственные слагаемые.

1) 5/8х - (1/4х - 1/12у) + 1/3у = 5/8x - 1/4x + 1/12y + 1/3y = x (5/8 - 1/4) + y (1/12 + 1/3) = x (5/8 + (1 * 2)/8) + y (1/12 + (1 * 4)/12) = x (5/8 + 2/8) + y (1/12 + 4/12) = x (5 + 2)/8 + y (1 + 4)/12 = 7/8x + 5/12y.

2) 9,4х + (2х - 11 3/4у) - 3 5/9у = 9.4x + 2x - 11 3/4y - 3 5/9y = x (9.4 + 2) - y (11 3/4 + 3 5/9) =  11.4x - y ((11 * 4 + 3)/4 + (3 * 9 + 5)/9) = 11.4x - y (47/4 + 32/9) = 11.4x - y ((47 * 9)/36 + (32 * 4)/36) = 11.4x - y (423/36 + 128/36) = 11.4x - y (423 + 128)/36 = 11.4x - y551/36 = 11.4x - 15 11/36y.