7,8 и 9
111*7 .11*8,11*9- все больше 666
623*8, 623*8, 623*9- все меньше 6230
/x/+3=5
/x/=5-3
/x/=2
{ x=2
{ x=-2
Ответ: x={2;-2}
Ответ:
(145у+58х-116х):29=(145у-58х):29=
145у-58х 29(5у-2х) =__________ = __________ = 5у - 2х
29 29
7 / 28 = 1 / 4 = 25%
45 / 40 = 9 / 8 = 112,5 %
1 4/5 / 9 = 9/5 / 9 = 9/5 * 1/9 = 1/5 = 20%
5/6 / 1 2/3 = 5/6 / 5/3 = 5/6 * 3/5 = 3/6 = 50%
0,15 / 3 = 15 / 300 = 5 / 100 = 5%
8,1 / 5,4 = 81 / 54 = 9 / 6 = 3 / 2 = 150%