Ответ:
1) (-2k/2b):(-18k/b)=(-2k/2b)×(b/-18k)=k/b×b/18k=1/18
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Ответ:
1) (-2k/2b):(-18k/b)=(-2k/2b)×(b/-18k)=k/b×b/18k=1/18