-1,5*(1,4х-3,5)=0,5*(2,3х-9)
-2,1х+5,25=1,15х-4,5
-2,1х-1,15х=-4,5-5,25
-3,25х=-9,75
х=-9,75:(-3,25)
х=3
Проверка:
правую часть сократили на -3
-3,4*1,3= -4,42
6,9/(-2,3)= -3*2,3/2,3= -3
-0,35/(-0,7)=35/70=0,5
-6/7 * (-2+13/18)= 12/7 + (6*13)/(7*6*3)= 12/7 + 13/21 =1+ 5/7 + 13/21 =
1+ 15/21 + 13/21= 1+ 28/21= 2+ 7/21=2+ 1/3=2целых1/3
(3+3/9)/(-2-2/3)= -(3+1/3)/(2+2/3)= -(10/3)*(3/8)= -10/8= -1целая2/8=
= -1 целая 1/4= -1,25
<span>2/5=0,4
4/5=0,8
1/4=0,25
1/10=0,1
1/2=0,5
3/5=0,6
3/20=0,15
7/10=0,7
3/10=0,3</span>
66 и 12 \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\