Ответ:
(318 + x) - 209 = 318 + - 209 = 109 + x
(436 + y) - 186 = 436 + y - 186 = 250 + y
x - 187 + 379 = x + 192
a - 426 + 550 = a + 124
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Ответ:
(318 + x) - 209 = 318 + - 209 = 109 + x
(436 + y) - 186 = 436 + y - 186 = 250 + y
x - 187 + 379 = x + 192
a - 426 + 550 = a + 124