а) 8y = -62,4 + 5y
\[ 8y - 5y = -62,4 \]
\[ 3y = -62,4 \]
\[ y = \frac{-62,4}{3} \]
\[ y = -20,8 \]
Ответ: y = -20,8
б) \(\frac{3}{4}x - \frac{2}{3}x + 1 = \frac{1}{6}x + 6\)
\[ 12 \left( \frac{3}{4}x - \frac{2}{3}x + 1 \right) = 12 \left( \frac{1}{6}x + 6 \right) \]
\[ 12 \times \frac{3}{4}x - 12 \times \frac{2}{3}x + 12 \times 1 = 12 \times \frac{1}{6}x + 12 \times 6 \]
\[ 9x - 8x + 12 = 2x + 72 \]
\[ x + 12 = 2x + 72 \]
\[ x - 2x = 72 - 12 \]
\[ -x = 60 \]
\[ x = -60 \]
Ответ: x = -60