Реши уравнения: x − 19 = 72; 3 · x = 18; 12 + x = 81; x · 6 = 48.

1. \(x-19=72\); \(x=72+19=91\).
2. \(3\cdot x=18\); \(x=18:3=6\).
3. \(12+x=81\); \(x=81-12=69\).
4. \(x\cdot6=48\); \(x=48:6=8\).

Ответ: 91; 6; 69; 8.