1/5-1/6=1/30 1/10-1/11=1/110
(3,4х+1,02)*30=(2х+0,6)*110
(3,4х+1,02)*3=(2х+0,6)*11
10,2х+3,06 = 22х + 6,6
11,8х=-3,54
х=-3,54/11,8=0,3
630/9=70!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
<span>1 8/11 + 2 2/19 * ( 1 4/5 - 2 3/4) =
1 4/5 - 2 3/4 = 9/5 -11/4 = 36/20 - 55/20 = -19/20
2 2/19 * ( -19/20) = 40/19 * 19/20 = - 2
1 8/11 + ( - 2 ) = 19/11 -2 = 19/11 -22/11 = -3/11</span>
2178*6=13 068
13 068/4=3 267
3 267+ 267= 3 534
10 000-3 534=6 466