1)Приведите подобные слагаемые 3а - 12в - 8а - в


2)

 

Равенство 11ав + * = - ав будет верным при

 

1) * = - 10 ав

 

2) * = 10 ав

 

3) * = - 12 ав

 

4) * = 12 ав

 

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