98765432 87654321 вроде так
Оба выражения равны, если x=0
а/. 3 1/3*(11/4:22/4)=10/3*1/2=10/6=
1 2/3
в/. 2 2/5(51/15-26/15)=12/5*5/3=60/15=4
( 6х - 4 )•5 > = ( 5х - 4 ) - 6
30х - 20 > = 5х - 4 - 6
30х - 20 > = 5х - 9
30х - 5х > = - 9 + 20
25х > = 11
Х > = 11/25
Х > = 0,44
Ответ [ 0,44 ; + бесконечность )
(6 5/8 - 1/2) - (5 3/4 - 2 1/6) + (9 5/8 - 7 1/3) = 4 /56
6 5/8 - 1/2 = 53/8 - 1/2 = (53-4)/8 = 49/8
5 3/4 - 2 1/6 = 23/4 - 13/6 = (69-26)/12 = 43/12
9 5/8 - 7 1/3 = 77/8 - 22/3 = (231-176)/24 = 55/24
49/8 - 43/12 + 55/24 = (147-86+55)/24 = 116/24 = 4 20/24 = 4 5/6