(3x)/4 =15

解答

\frac{3 x}{4} = 15

x = 20

求解步骤

\frac{3 x}{4} = 15

在两边乘以

4

3 x = 60

两边除以

3

x = 20

24 + 4 n = - (n + 6)

so l v e f or h, a = 2 π r^{2} + 2 π r h

x (x - 4) - 2 = x^{2} - 4 (x + 3)

- \frac{1}{6} \cdot x - \frac{1}{2} + 21 \cdot (x + 2) = \frac{- 6 \cdot ( x - 3 )}{7}

3 x + 5 = x + 2