х:456=389 23.650:х=50 67.068:324+330:30=218
х=456*389 х=23.650:50
х=177.384 х=473
проверка: проверка:
177.384:456=389 23.650:473=50
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х:456=389 23.650:х=50 67.068:324+330:30=218
х=456*389 х=23.650:50
х=177.384 х=473
проверка: проверка:
177.384:456=389 23.650:473=50