уравнение(5x+2x)14=294
(5x+2x)14=294
7х=294:14
7х=21
х=21:7
х=3
Проверка:
(15+6)*14=294
21*14=294
294=294
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Verified answer
(5x+2x)14=294
7х=294:14
7х=21
х=21:7
х=3
Проверка:
(15+6)*14=294
21*14=294
294=294