x-2+0.4x/0.6=1-(0.5x-1)/0.5

x/0.5-0.4x-0.6/0.2=2(-x+3) x-2-2-x/2=x-2/3 x-0.6/0.4+x=0.1x+1/0.3 x/x-2+x-9/x-7=x+1/x-1+x-8/x-6, x/x-2+x-9/x-7=x+1/x-1+x-8/x-6, x/x平方-x+2=2x/x+1 (X+1)X(X+2)X(X+3)=504 先化简再求值先化简再求值：（x-x/x+1）(x+1/x^2+4x+4)(x^2-4/x^2-2x),其中x=-0.5 一个“整式的乘法”的问题请先阅读下列解题过程,再仿做下面的问题.已知X*X + X - 1=0,求X*X*X + 2*X*X + 3的值.解X*X*X + 2X*X +3=X*X*X +X*X -X +X*X +X +3=X{X*X +X -1} +X*X +X -1 +4=0+0+4=4+ x + X*X + X*X*X=0.+ X*X + X*X*X (x+2)(x-1)+(x+3)(x+1)=x·x-1 求x (5x-4)(2x+5)(3x-6)(2x-4)=(2x-4)(2x+5)·0.5 求x 1 .30/0.5x-30/0.6x=2 2 .x/4-x/5=0.1 解方程:x-2+0.4x/0.6=1-(0.5x-1)/0.5 x=2+0.4x/0.6+1-(0.5x-1)/0.5 x-2+0.4x/0.6=1-(0.5x-1)/0.5 1、0.3X-0.4X=0.5 2、5X-2.5X+3.5X=-18 3、X-2/5X=-3+6解这些一元一次方程, 解方程:x/4=30% 36/x=3/4 10/x=2.5/0.8 x/4=1.2/5 X/1.2=1.5/0.6 x/0.4=1.5/6 x/7=0.6/3.5 x/10=0.1/25-3x=8x+1 2(x-2)+2=x+1 3-x=2-5(x-1) 3x=5(32-x) 7(4-x)=9(x-4) 7x-8=2x+27 5x-18=3-2x (7x-4)+3(x-2)=2x+6 2(3x-4)+(4-x)=4x我是六年级的学生,我希望 *-----------------------------------------------*| 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 || 求解方程式,唉,把学的东西全还给老师了.0.1X+0.2(X-2)+0.3(X-4)+0.2(X-6)+0.1(X-8)+0.05(X-10)+0.05（X-12）=12.50.1X+0.2X-0.4+0.3X-1.2+0.2X-1.2+0.1X-0.8+0.05X-0.5+0.05-0.6=12.5X-4.7=12.5X=12.5+4.7X=17.2这个方程式是我们老大算 (x/x-2)+(2/x*2+2x)-(x+6/x*2-4)化简,=x^2/x(x-2)+(2x-4)/x(x^2-4)-(x^2+6x)/x(x^2-4)=x^2/x(x-2)-(x+2)/x(x-2)=(x-2)(x+1)/x(x-2)=(x+1)/x