展开 8(y= 5/8 x+5)

解答

展开

8 (y = \frac{5}{8} x + 5)

8 y = \frac{5 x}{8} + 40

求解步骤

8 (y = \frac{5}{8} x + 5)

= 8 (\frac{5}{8} = x y + 5)

使用分配律:

a (b + c) = ab + a c

a = 8, b = y = \frac{5}{8} x, c = 5

8 y = \frac{5}{8} x + 8 \cdot 5

乘开

\frac{5}{8} x + 8 \cdot 5 : \frac{5 x}{8} + 40

8 y = \frac{5 x}{8} + 40

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