Решение:
56×(х+9)-30=530
(56х+504)-30=530
(56х+504)=530+30
56х+504=560
56х=560-504
56х=56
х = 1
Ответ:
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Решение:
56×(х+9)-30=530
(56х+504)-30=530
(56х+504)=530+30
56х+504=560
56х=560-504
56х=56
х = 1
Ответ: