119. Решите уравнения: a) x/6 - 7 = 0; б) 2x/9 + 4 = 0; г) 3x/8 - 12 = 0.

Решение:

1. \( \frac{x}{6} - 7 = 0 \)

\( \frac{x}{6} = 7 \)
\( x = 7 \cdot 6 \)
\( x = 42 \)
2. \( \frac{2x}{9} + 4 = 0 \)

\( \frac{2x}{9} = -4 \)
\( 2x = -4 \cdot 9 \)
\( 2x = -36 \)
\( x = -18 \)
3. \( \frac{3x}{8} - 12 = 0 \)

\( \frac{3x}{8} = 12 \)
\( 3x = 12 \cdot 8 \)
\( 3x = 96 \)
\( x = 32 \)

Ответ: a) \( x = 42 \); б) \( x = -18 \); г) \( x = 32 \).