化简 130(y/5-1/13)

解答

化简

130 (\frac{y}{5} - \frac{1}{13})

26 y - 10

求解步骤

130 (\frac{y}{5} - \frac{1}{13})

合并

\frac{y}{5} - \frac{1}{13} : \frac{y \cdot 13 - 5}{65}

= 130 \cdot \frac{y \cdot 13 - 5}{65}

= 130 \cdot \frac{13 y - 5}{65}

使用分式法则:

a \cdot \frac{b}{c} = \frac{a \cdot b}{c}

= \frac{130 ( 13 y - 5 )}{65}

数字相除:

\frac{130}{65} = 2

= 2 (13 y - 5)

展开

2 (13 y - 5) : 26 y - 10

= 26 y - 10

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