Ответ:
1) \(63:9+(a-47)\cdot6=49\); \(7+(a-47)\cdot6=49\); \((a-47)\cdot6=42\); \(a-47=7\); \(a=54\).
Проверка: \(7+(54-47)\cdot6=7+42=49\).
2) \((14+a\cdot7):7=42-37\); \((14+7a):7=5\); \(14+7a=35\); \(7a=21\); \(a=3\).
Проверка: \((14+3\cdot7):7=35:7=5\).
Ответ: \(a=54\); \(a=3\).
