решите уравнения 2цел 4\7:(0,5х-23\35)=7,5 . 1цел.2\7у-1\2):2,5=5,2 . (1\4+3\4х):0,45=25/36. 22*(17\26х-3\4)=5цел.1\13.

1) 2 4/7 : (0,5х - 23/35) = 7,518/7 : (5/10х - 23/35) = 7 5/1018/7 : (1/2х - 23/35) = 75/1018/7 : (1/2х - 23/35) = 15/21/2х - 23/35 = 18/7 : 15/21/2х - 23/35 = 18/7 * 2/151/2х - 23/35 = 2/7 * 18/151/2х - 23/35 = 2/7 * 6/51/2х - 23/35 = (2 * 6)/(7 * 5)1/2х - 23/35 = 12/351/2х = 12/35 + 23/351/2х = (12 + 23)/351/2х = 35/351/2х = 1х = 1 : 1/2х = 1 * 2х = 2Ответ: 22) (1 2/7у - 1/2) : 2,5 = 5,2(9/7у - 1/2) : 2 5/10 = 5 2/10(9/7у - 1/2) : 25/10 = 52/10(9/7у - 1/2) : 5/2 = 26/59/7у - 1/2 = 26/5 * 5/29/7у - 1/2 = 5/5 * 26/29/7у - 1/2 = 1 * 139/7у - 1/2 = 139/7у = 13 + 1/29/7у = 26/2 + 1/29/7у = (26 + 1)/29/7у = 27/2у = 27/2 : 9/7у = 27/2 * 7/9у = 7/2 * 27/9у = 7/2 * 3у = (7 * 3)/2у = 21/2у = 10 1/2у = 10 5/10у = 10,5Ответ: 10,53) (1/4 + 3/4х) : 0,45 = 25/36 (1/4 + 3/4х) : 45/100 = 25/36 1/4 + 3/4х = 25/36 * 45/1001/4 + 3/4х = 45/36 * 25/1001/4 + 3/4х = 5/4 * 1/41/4 + 3/4х = (5 * 1)/(4 * 4)1/4 + 3/4х = 5/163/4х = 5/16 - 1/43/4х = 5/16 - 4/163/4х = (5 - 4)/163/4х = 1/16х = 1/16 : 3/4х = 1/16 * 4/3х = 4/16 * 1/3х = 1/4 * 1/3х = 1/(4 * 3)х = 1/124) 22 * (17/26х - 3/4) = 5 1/1322 * (17/26х - 3/4) = 66/1317/26х - 3/4 = 66/13 : 2217/26х - 3/4 = 66/22 : 1317/26х - 3/4 = 3 : 1317/26х - 3/4 = 3/1317/26х = 3/13 + 3/417/26х = 12/52 + 39/5217/26х = (12 + 39)/5217/26х = 51/52х = 51/52 : 17/26х = 51/52 * 26/7х = 26/52 * 51/7х = 1/2 * 51/7х = (1 * 51)/(2 * 7)х = 51/14х = 3 9/14Ответ: 3 9/14