(0.2-x)/0.4=1-0.3x/2

(x+1)/0.3-2x=(0.1x+0.2)/0.05 x-2-2-x/2=x-2/3 x-0.6/0.4+x=0.1x+1/0.3 (x-1)+(x+2)+0.2x+2x=46 21分之10x÷3分之2=7分之3x-3分之1x-2分之1x=190x-53x=7408.5x-6.9x=43.3x-200=0.2x+1101.02+0.4x+2.6x=3.428.9x-67=4.5x+656x-58=3x+1410x-20=5x+806x+5=10x-3420-1.4x=9.8x-288.2x+5.4x=272 (0.2-x)/0.4=1-0.3x/2 0.2（x-2）-（0.4x-1）=0.3(x-1) 0.4(x-3)/0.3-(0.1x-0.2)/0.04=1-(x-1/2) 0.3/0.4(x-3)-0.04/0.1x-0.2=1-2/x-1 1-0.5x/0.3-2/3x=0.3x/0.2x+1 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 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, 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+1 0.1x+0.2 _____ -2x = _____ 0.3 0.05x+1 0.1x+0.2 0.3 0.05 数学题,一元一次方程. x-4=2-5x 4x-3（20-x)=5x-7(20-x) 1-2x-5/6=3-x/4 x/0.3-0.17-0.2x/0.02=1 x-2/6-x+2/3=x-1/2+10.01+0.02x/0.03-1-0.3x/0.2=1 2-(1-x)=-3、3(x-3)=2x-1,0.4x-3(20-0.2x)=3, 解方程:2- x+5/6=x- x-1/3,0.1-0.2x/0.03-1=0.7-x/0.4