1) 507 - x = 17x = 507 - 17x = 490
Проверка: 507 - 490 = 17 ✓
2) x - 245 = 318x = 318 + 245x = 563
Проверка: 563 - 245 = 318 ✓
3) 420 - x = 184x = 420 - 184x = 236
Проверка: 420 - 236 = 184 ✓
Ответы: x = 490, x = 563, x = 236
1) 507 - x = 17
x = 507 - 17
x = 490
Проверка: 507 - 490 = 17 ✓
2) x - 245 = 318
x = 318 + 245
x = 563
Проверка: 563 - 245 = 318 ✓
3) 420 - x = 184
x = 420 - 184
x = 236
Проверка: 420 - 236 = 184 ✓
Ответы: x = 490, x = 563, x = 236