Ответы на вопрос:
2400÷x=2 2x=2400 x=2400÷2 x=1200 $$$$$$$$$$$$$ a+21000=100000 a=100000-21000 a=79000 $$$$$$$$$$$$$ 4y=560000 y=560000÷4 y=140000 $$$$$$$$$$$$$$ b-47000=100000 b=100000+47000 b=147000
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