Объяснение:
6.) 10а+6b-6b+a / 11a³=11a / 11a³=1/a²
7.) 5y-15 / (y-3)(y+3)= 5(y-3) / (y-3)(y+3)= 5/y+3
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Объяснение:
6.) 10а+6b-6b+a / 11a³=11a / 11a³=1/a²
7.) 5y-15 / (y-3)(y+3)= 5(y-3) / (y-3)(y+3)= 5/y+3