150(2x+90)=21000

解答

150 (2 x + 90) = 21000

x = 25

求解步骤

150 (2 x + 90) = 21000

两边除以

150

2 x + 90 = 140

将

90

到右边

2 x = 50

两边除以

2

x = 25

3 (x - 2) - 2 (x + 3) = 2 (x - 3)

t n = 2 n^{2} + 2 n + 3

so l v e f or c, 4 c + 3 f = 16.53

65500 = (24500 + X) (1 + 0.18 \cdot \frac{18}{3})

- 2 x = - 4 x + 10 - 12