ldcf.net
当前位置:首页 >> X十2/5x=7/8 >>

X十2/5x=7/8

7/5X=7/8 X=5/8

X+7/8X=2/5 15/8x=2/5 x=2/5÷15/8 x=16/75

7/8x减2/5x等于二十分之19。用解方程来。 7/8x-2/5x=19/20 (7/8-2/5)x=19/20 19/40x=19/20 x=2

3/5+2/5x=7/8 解:2/5x=7/8-3/5 2/5x=35/40-24/40 2/5x=11/40 x=11/40*5/2 x=11/16

7/4:x=2/5:5/8 解: 2/5x=7/4×5/8 2/5x=35/32 x=175/64

如图

(10-x)÷2=5x-7 10-x=10x-14 10-x+x+14=10x-14+x+14 11x=24 11x÷11=24÷11 x=2411.

5x/[(x+3)(x-2)]+(2x-5)/[(x-4)(x+3)]=(7x-10)/[(x-2)(x-4)] 同时乘以(x-2)(x+3)(x-4) 5x(x-4)+(2x-5)(x-2)=(7x-10)(x+3) 5x^2-20x+2x^2-9x+10=7x^2+11x-30 40x=40 x=1

①5 ②1/10 ③2/5

网站首页 | 网站地图
All rights reserved Powered by www.ldcf.net
copyright ©right 2010-2021。
内容来自网络,如有侵犯请联系客服。zhit325@qq.com