Предмет: Алгебра, автор: thelenk

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Автор ответа: A1dar
0
frac{6a^2-4a}{15a}-frac{a^2+a}{15a}=frac{6a^2-4a-a^2-a}{15a}=frac{5a^2-5a}{15a}=frac{5a(a-1)}{15a}=frac{a-1}{3}
frac{x-y}{8}+frac{x+y}{8}=frac{x-y+x+y}{8}=frac{2x}{8}=frac{x}{4}
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