1) 3,8х - 5,6 = 6,6х - 8,4;
6,6х - 3,8х = 8,4 - 5,6;
2,8х = 2,8;
х = 2,8 ÷ 2,8;
х = 1;
2) 28/33 ÷ 23/14 × 45/98 = 28/33 × 14/23 × 45/98 = 28/33 × 1/23 × 45/7 = 4/33 × 1/23 × 45 = 180/759;
а) 14/23 × 45/98 = 1/23 × 45/7;
б) 28/33 × 45/7 = 4/33 × 45;
в) 4/33 × 1/23 = 4/759;
г) 4/759 × 45 = 180/759;
Второй вариант.
28/33 = 28 ÷ 33 = 0,85;
23/14 = 23 ÷ 14 = 1,64;
45/98 = 45 ÷ 98 = 0,46;
0,85 ÷ 1,64 × 0,46 = 0,52 × 0,46 = 0,24.
