(150-3X):(150-X)=4:8

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(150-3X):(150-X)=4:8

(150-3X):(150-X)=4:8
(150-3X):(150-X)=4:8

(150-3X):(150-X)=4:8
(150-3X):(150-X)=4:8
4(150-X)=8(150-3X)
600-4X=1200-24X
24X-4X=1200-600
20X=600
X=600/20
X=30

8(150-3X)=4(150-X)
5x=150
x=50

150-3X:150-X=4:8
2(150-3X)=150-x
x=30

(150-3X):(150-X) = 4:8
8×(150-3X)=4×(150-X)
1200-24X =600-4X
24X =1200-600
X =600÷24
X =25(依据是比例的基本性质)

(150-3X):(150-X)=4:8
(150-3X):(150-X)=1:2
(150-3X)×2=150-X
300-6x=150-x
5x=150
x=30

(150-3X):(150-X)=4:8 解九宫格题目(X为未知数)9 X 2 X 7 X 8 X XX X 4 X X 9 X 6 X1 3 X 5 X X X X 24 X X 8 5 X X 1 XX 8 9 4 X 1 6 7 XX 1 X X 3 6 X X 88 X X X X 2 X 3 6X 5 X 6 X X 9 X XX X 7 X 4 X 2 X 1 解方程:(x-8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3) 解下列方程!就三道!解下列方程.1、x/x-2 - 1-x²/x²-5x = 2x/x-3(x/x-2 - 1-x²不是一起的!)2、5x/x²+x-6 - 5-2x/x²-x-12=7x-10/x²-6x+8(5x/x²+x-6 - 5-2x不是一起的!)3、x-4/x-5 + x-8/x-9=x-7/x- x+5/x+1-3x-3/x+5=8x+28/x^2+4X-5-2(x+5)/(x+1)-(3x-3)/(x+5)=(8x+28)/(x^2+4X-5)-2 3×(x+1)+4x+8=4(x+1)+5x-7 8x+4=32.(X+3)/6=9X=?X=? 1.(x^3-x^2-4x+1)/(x^2-3x+2)-(x^3-2x^2-9x+21)/(x^2-5x+6)+(x^2-3x+8)/(x^2-4x+3)2.{(x^2)/(x-y)}*{y/(x+y)}-{(x^4y)/(x^4-y^4)}÷{(x^2/x^2+y^2)^2} (x-6)+(x-3)+x+(x+3)+(x+6)=150 EXCEL两表间同时满足两个条件数据引用如题:表1为原始数据表1 2 3 4 5 6 7 8 9 10.A X X X X X X X X X XB X X X X X X X X X XC X X X X X X X X X XD X X X X X X X X X X .表2(A列) (B列) (C列)A 1A 3B 8B 5C 2D 3...... *-----------------------------------------------*| 6 4 X | 8 X X | X X 5 || X X X | X X X | X 7 8 || X X X | X X X | X X X ||---------------+---------------+--------------- || X X X | X X X | 5 1 X || X X X | X 6 X | X X X || 8 X X | 3 5 X | 2 X X || -(X²+3X)+2(4X+X²)其中X=-2 (8-7x-6x²+2x³)+(x³+5x²+4x-1)-(-x²-3x+2x³-3) 问(x-8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3)(/是分数线) X是多少? 通分:(1)2/x^2+x-2,1/x^2-2x-8(2)x/x^2-3x-4,1/x^2-8x+16 解下列方程6题8 X(x+1/5)= 3.2 3/5 X (x - 50%)=1/10x+7/2=1/5x+11.5 1/2x - 41/10=150%x-8.320%x=3/5 - x 1/4X(x - 0.75) = 13/16 8x-[-3x-(2x-7x-5)+3]+4x化简 3X+(X+2)+(X+1)*(X-1)=4*(X²+8)