2 уравнения 40 баллов

1) 7(x+ 2/3) + 1/3 = 4(x + 1/3)

7x + 14/ 3 + 1/3 = 4x + 4/3;

7x + 5 = 4x + 4/3;

7x - 4x = 4/3 - 5;

3x = - 11/3

x = - 11/9;

2) 3 1/3 (3x - 7/20) - 8x = - 2,5;

10/3 • ( 3x - 7/20) - 8x = - 2,5;

10x - 7/6 - 8x = - 2,5;

2x - 7/6 = - 2,5;

2x = - 2,5 + 7/6;

2x = - 5/2 + 7/6;

2x = - 4/3

x = - 2/3;