x + 346 = 912x = 912 - 346x = 566
276 + y = 565y = 565 - 276y = 289
821 - a = 439a = 821 - 439a = 382
Ответ: x = 566, y = 289, a = 382.
x + 346 = 912
x = 912 - 346
x = 566
276 + y = 565
y = 565 - 276
y = 289
821 - a = 439
a = 821 - 439
a = 382
Ответ: x = 566, y = 289, a = 382.