Решите уравнения: 1) 0,2+1/5 х=0,4 х-1/15 2) 1/2 х-1/3=5/9+1/6 х 3) 2,25 х - 1 1/3 = -3-1/4 х

1) 0,2+1/5 х=0,4 х-1/15

2/10 + 2/10 х = 4/10 х - 1/15

2/10 + 1/15 = 4/10 х - 2/10 х

6/30 + 2/30 = 2/10 х

8/30 = 2/10 х

х = 8/30 : 2/10

х = 8/30 * 10/2

х = 5 * 8/30

х = 40/30

х = 4/3

х = 1 1/3

2) 1/2 х-1/3=5/9+1/6 х

1/2 х - 1/6 х = 5/9 + 1/3

3/6x - 1/6x = 5/9 + 3/9

2/6x = 8/9

x = 8/9 : 2/6

x = 8/9 * 6/2

x = 3 * 8/9

x = 8 * 3/9

x = 8 * 1/3

x = 8/3

x = 2 2/3

3) 2,25 х - 1 1/3 = - 3 - 1/4 х

2,25 х - 4/3 = - 3 - 0,25 х

2,25 х + 0,25x = - 3 + 4/3

2,5x = - 9/3 + 4/3

2,5x = - 5/3

x = - 5/3 : 2,5

x = - 5/2,5 : 3

x = - 50/25 : 3

x = - 2 : 3

x = - 2/3