X-0,4•(1,8x-1,3x) = х -0,72х +0,52 = 0,28х +0,52
3/7*14/27=1/7*14/9=1/1*2/9=2/9
5/36*9=5/4*1=5/4=1 1/4=0,25
49/96*24/35=49/4*1/35=7/4*1/5=7/20
4 4/9*0,25=40/9*0,25=10/9=1 1/9 или
4 4/9*0,25=40/9*25/100=40/9*1/4=10/9*1/1=10/9=1 1/9
3 3/11*1 2/9=36/11*20/9=4/11*20/1=80/11=7 3/11
5/16*1 14/25*4/13=5/16*39/25*4/13=1/16*39/5*4/13=1/16*3/5*4/1=
=1/4*3/5*1/1=3/20
( 48/180-75/180) +( -3/10-15/100)= -27/180 +(-30/100-15/100) = -27/180-45/100=-2700/18000-8100/18000=-5400/18000=-54/180=-6/20=-3/10=-0,3
1/10 + 3/10+ 1/10 +1/5 +3/5= 1/10+3/10+1/10+2/10+6/10=13/10= 1 3/10