1) 4,8x - 0,3 = 4,2 * 0,54,8x - 0,3 = 2,14,8x = 2,4x = 2,4 / 4,8x = 0,5
2) 1 целая 3/4 - 5x = 2 целых 3/4 : (-3 целых 2/3)7/4 - 5x = 11/4 : (-11/3)7/4 - 5x = 11/4 * 3/117/4 - 5x = 3/45x = 4/4x = 1
3) 20x + 0,4 (-6 целых 1/4) = 4 целых 2/3 : (-1/4)20x + 0,4 (-25/4) = 14/3 : (-1/4)20x - 10 = 14/3 * 420x - 10 = 56/320x = 56/3 + 1020x = 56/3 + 30/320x = 86/3x = 86/60x = 43/30
1) 4,8x - 0,3 = 4,2 * 0,5
4,8x - 0,3 = 2,1
4,8x = 2,4
x = 2,4 / 4,8
x = 0,5
2) 1 целая 3/4 - 5x = 2 целых 3/4 : (-3 целых 2/3)
7/4 - 5x = 11/4 : (-11/3)
7/4 - 5x = 11/4 * 3/11
7/4 - 5x = 3/4
5x = 4/4
x = 1
3) 20x + 0,4 (-6 целых 1/4) = 4 целых 2/3 : (-1/4)
20x + 0,4 (-25/4) = 14/3 : (-1/4)
20x - 10 = 14/3 * 4
20x - 10 = 56/3
20x = 56/3 + 10
20x = 56/3 + 30/3
20x = 86/3
x = 86/60
x = 43/30