1) 0,8 (2y - 3) + 5 (1,6-0,5 y) - 2 (0,8y - 1,7) 2) 5/6 ( 1/5n+ 6) - 2/3 (9-1/2 n) + 5/8 (4/5 n- 8)

Question

1) 0,8 (2y - 3) + 5 (1,6-0,5 y) - 2 (0,8y - 1,7) 2) 5/6 ( 1/5n+ 6) - 2/3 (9-1/2 n) + 5/8 (4/5 n- 8)

Математика

1) 0,8 (2y - 3) + 5 (1,6-0,5 y) - 2 (0,8y - 1,7) 2) 5/6 ( 1/5n+ 6) - 2/3 (9-1/2 n) + 5/8 (4/5 n- 8)

Гость

Ответ(ы) на вопрос:

Accepted Answer

0,8 (2y - 3) + 5 (1,6-0,5 y) - 2 (0,8y - 1,7) 1.6y - 2.4 + 8 - 2.5y - 1.6y + 3,4 1.6y - 2.5y - 1.6y = 3.4 - 2.4 + 8 - 2.5y = 9 y = 9 : - 2.5 y = 3.6 5/6 ( 1/5n+ 6) - 2/3 (9-1/2 n) + 5/8 (4/5 n- 8) 1/6n + 5 - 6 + 1/3n + 1/2n - 5 1/6n + 1/3n + 1/2n = 5 - 6 - 5 n = - 6