1.5:2.4=X:4 X:1.2=2.5:3.6求解比例.

3X-18=13.2 1.5X-X=6 4X+1.2X=26 x+1.5x=7500 x-0.85x=3 4x-1.2=74 6.4x-1.2=4x+2.4 (2x+x+x/1.5)*4=110求x 5x-x=2.4 1.5x-x=1 6.6x-6x=1.8 2x-2/3x=3/4 解方程 x+ x+(x*50%)=1.5X? 4x+x=2. 0.3+0.3x=0.39 x= 2x-1.5x=7.6x x= 0.36x÷0.3=1.2 x=6（x+1.2)=18.6 x= 7x+2x = 8.1 x= (x-5）÷3=1.7 x=5（x+1.1)=15.5 x= 9x+25=70 x= 7x-4x=2.1 x= 解方程.1.2X=7.2 X+1.5=10 4(X+2.4)=24.8 5X-4*9=24 0.81/X=0.9 6+4X=10解方程.1.2X=7.2 X+1.5=10 4(X+2.4)=24.8 5X-4*9=24 0.81/X=0.9 6+4X=10 先化简再求值：2x²-4x/x+2·x²+2x/x²-4x+4+4x/2-x,其中x=1/2. x=4x=254 5x-x=180 3x+x=16 4x-2x=28 15x-11x=12.8 (12+12*1.5)x=360 3.5(85=X)=560 (x+2x)*2=54 1.2x*1.5-1.5x=18*2怎么算 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 （X+X)+(X-X)+(X*X)+(X/X)=100 1.2X-1=X+3 2.X+[2-1/2(X-4)]=2X+3 3.2X+3(2X-1)=16-(X+1) 4.X-3/2-4X+1/5=1 x-9/6-x+2/3=x-1 x/5-1.5=-1.2x+5 3(5-1.2x)+1.4=x-9/6-x+2/3=x-1x/5-1.5=-1.2x+53(5-1.2x)+1.4=-2(0.3x-1)1-x=-2(3x-2)-12/3x-3/2=1/4x-3/4(6x-5)+[2x-(4x-1)]=-24 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 5x-4x=2*1.8,5x-2+3x=3.6,x+4x=20.3,8x+10-3x=30,10.5-0.5x+0.5=1,x+2x+5x=10,解方程,5x-4x=2*1.8,5x-2+3x=3.6,x+4x=20.3,8x+10-3x=30,10.5-0.5x+0.5=1,x+2x+5x=10,0.8x-0.2+1.2x=1.8,2.4x+0.6+1.6=8 解方程：答得好有加分 4x+3=2-x 7x+6=6x 4-3x=x+1 x+1=二分之一x-1 0.3x=1.2 0.3x-1.5=x+0.60.125x+2.75=-1.25x 0.35x-1.5=-2.15x+3.5