2. Реши уравнения: a) \(\(\frac{16}{21}\)x - 2,48 = \(\frac{3}{7}\)x - 1,18; б) 5(1 - 2y) = 7 - 4(3y + 1).

Решение:

1. а) \(\frac{16}{21}x - \frac{3}{7}x = 2,48 - 1,18 \) \(\frac{16}{21}x - \frac{9}{21}x = 1,3 \) \(\frac{7}{21}x = 1,3 \) \(\frac{1}{3}x = 1,3 \) \(x = 1,3 \cdot 3 \) \(x = 3,9 \)
2. б) \( 5 - 10y = 7 - 12y - 4 \) \( 5 - 10y = 3 - 12y \) \( -10y + 12y = 3 - 5 \) \( 2y = -2 \) \( y = -1 \)

Ответ: а) x = 3,9; б) y = -1.