1. \( y : 12 = 8 \)\( y = 8 \cdot 12 \)\( y = 96 \)
2. \( 120 : x = 20 \)\( x = 120 : 20 \)\( x = 6 \)
3. \( 98 - b = 79 \)\( b = 98 - 79 \)\( b = 19 \)
Ответ: \( y = 96 \), \( x = 6 \), \( b = 19 \).