Ответ:
1. 2x+7x=198
9x=198
x=198÷9
x=22
5. 605k-596k=351
9k=351
k=351÷9
k=39
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Ответ:
1. 2x+7x=198
9x=198
x=198÷9
x=22
5. 605k-596k=351
9k=351
k=351÷9
k=39