в) 1/2(4-3 целых 1/2х)=1 целая 1/4х-1/21/2•4 - 1/2• 3 1/2х= 1 1/4х -1/22- 1/2• (2•3+1)/2Х= (4•1+1)/4Х- 1/22- 1/2• 7/2Х=5/4Х -1/22- 7/4Х = 5/4Х -1/22+ 1/2= 5/4Х+ 7/4Х 2 1/2= 12/4Х 2 1/2= 3Х Х= 2 1/2 : 3Х= (2•2+1)/2 • 1/3Х= 5/2• 1/3Х= 5/6Проверка в) 1/2(4-3 целых 1/2х)=1 целая 1/4х-1/21/2•(4- 3 1/2• 5/6) =1 1/4• 5/6 -1/21/2•(4 -(3•2+1)/2• 5/6)= (4•1+1)/4• 5/6-1/21/2• (4- 7/2• 5/6)= 5/4• 5/6 -1/21/2• (4- 35/12)= 25/24- 1/21/2• (4- 2 11/12)= 25/24- (1•12)/(2•12)1/2• (3 12/12- 2 11/12)= 25/24- 12/241/2• (1 1/12)= 13/241/2• (12•1+1)/12= 13/241/2• 13/12= 13/2413/24= 13/24. В десятичных. в) 1/2(4-3 целых 1/2х)=1 целая 1/4х-1/20,5• (4- 3,5х)= 1,25х- 0,50,5•4- 0,5• 3,5х= 1,25х-0,52- 1,75х= 1,25х-0,52+0,5= 1,25х+ 1,75х2,5= 3хХ= 2,5:3Х=25/10•1/3Х= 5/2• 1/3Х= 5/6.