1) 4,8х - 0,3 = 4,2 * (0,5)4,8х - 0,3 = 2,14,8х = 2,1 + 0,34,8х = 2,4x = 2,4 / 4,8x = 0,5
2) 1 целая 3/4 - 5х = 2 целых 3/4 : (-3 целых 2/3)7/4 - 5х = 11/4 : (-11/3)7/4 - 5x = -11/3 * 4/37/4 - 5x = -44/9-5x = -44/9 - 7/4-5x = -44/9 - 63/36-5x = -176/36 - 63/36-5x = -239/36x = 239/180
3) 20х + 0,4 (-6 целых 1/4) = 4 целых 2/3 : (-1/4)20x - 2,4 = 14/3 : (-1/4)20x - 2,4 = 14/3 4/120x - 2,4 = 56/320x = 56/3 + 2,420x = 56/3 + 7,2/320x = 63.2/320x = 19.2x = 19.2 / 20x = 0.96
1) 4,8х - 0,3 = 4,2 * (0,5)
4,8х - 0,3 = 2,1
4,8х = 2,1 + 0,3
4,8х = 2,4
x = 2,4 / 4,8
x = 0,5
2) 1 целая 3/4 - 5х = 2 целых 3/4 : (-3 целых 2/3)
7/4 - 5х = 11/4 : (-11/3)
7/4 - 5x = -11/3 * 4/3
7/4 - 5x = -44/9
-5x = -44/9 - 7/4
-5x = -44/9 - 63/36
-5x = -176/36 - 63/36
-5x = -239/36
x = 239/180
3) 20х + 0,4 (-6 целых 1/4) = 4 целых 2/3 : (-1/4)
20x - 2,4 = 14/3 : (-1/4)
20x - 2,4 = 14/3 4/1
20x - 2,4 = 56/3
20x = 56/3 + 2,4
20x = 56/3 + 7,2/3
20x = 63.2/3
20x = 19.2
x = 19.2 / 20
x = 0.96