40/100*x+(120/10-x)*50/100=7/5是120/100

100-2x+5x=120(x+3)×5-2x=30100-(4x+1)-(4x+1)=204x+8=6x-10 100-2x+5x=120(x+3)×5-2x=30100-(4x+1)-(4x+1)=204x+8=6x-10 （X+X)+(X-X)+(X*X)+(X/X)=100 解方程:(X-50)[200+2(70-X)]=4500 (30-2X)(20-2X)=(1-3/8)×30×20 (-1/10X+30)(X-60)=1340(-10X+320)(X-20)-40=310 (X-40)(100-2X+120)=2250 (X-40)(-X/10+8)=17.5 10x+x*x=40 X+X-10+X+8=100 求x:x(10^x)=100 x-2=(104-x)+2 6x-59=10x-75 (x+10)+(x-15)=280-x4（x-62)=x-38 60x-40=(60+20)*(x-5) 32x+32*0.5-25x+64x=24x+496-49x x+15=3*(109-x ) 5(3x-1.4)=2(6x-0.5) 3(x+0.9)=5(x-1.7) 13x-4(2x+5)=17(x-2)-4(2x-1) (13x+8)/3=5x-1x-60=2[(3561-x)+100]+1 (x+9)+12=2[(x-9)-1 60％x+25=40 x+30％x=52 19-120％x=7 4分之3x-5％x=17.5 x-10％x=18 （1-25％）x=36 2x+30％x=9.2 200x+170(70-x)+100(40-x)+x-10= X-40%X=120 x-40/x-120求解 怎样计算百分数的方程120-25%x=100x+13%x-28%x=3.4(1-40%)x=720x-95%x=155 （60+x)(300-10x)-40(300-10x)怎么化简成-10X^2+100x+6000 100×2x+10x+3x+216=100×3x+10×2x+x 100(X - 2) + 10X + 2X = 100*2X + 10X + X - 2 - 495 一元一次方程：x-100/50-2=x-100/60+5 x/120-x/130=2 6x+x-1/5+1=100 2x-1/3-10x+1/12=2x+1/4-1 解方程26(8-X)-6=150 4x-2(x+20)=40 4x-2(100-x)=40 4x-2(50-x)=20 9(x-8)=8x=10