(100%-10%)*x+(100%+5%)*(100-x)=103.2 .
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(100%-10%)*x+(100%+5%)*(100-x)=103.2.(100%-10%)*x+(100%+5%)*(100-x)=103.2.(100%-10%)*x+(100%+5%)*(10
(100%-10%)*x+(100%+5%)*(100-x)=103.2 .
(100%-10%)*x+(100%+5%)*(100-x)=103.2 .
(100%-10%)*x+(100%+5%)*(100-x)=103.2 .
(100%-10%)*x+(100%+5%)*(100-x)=103.2
解:90%X+105%*(100-X)=103.2
90X+105(100-X)=10320
90X+10500-105X=10320
15X=10500-10320
X=12
8(x+15)-20=10x 2(100-x)-15=150-x 25x-165=10(15-x) 5(x-10)=3x-6
8(x+15)-20=10x 2(100-x)-15=150-x 25x-165=10(15-x) 5(x-10)=3x-6
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-2x+3x-4x+5x.+99x-100x=25求解
2x+3x+4x+5x+x+6x+7x=100
2（6X方+X）方-11（6X方+X）+5X四次方-10X方+9X三次方-7X方+12X（X+Y)方+2(X+Y)-15A四次方-21A方-100（X方+X）方-14（X方+X）+24X方（X-1）-Y方（X-1)
（X+X)+(X-X)+(X*X)+(X/X)=100
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
（100-2x-10x）/5=20-2x-2/5*x
(5x+x)(x-5x)=100
(100+x)*1/3=2/5x 比如x+5=10 x=10-5 x=5
100×2x+10x+3x+216=100×3x+10×2x+x
100(X - 2) + 10X + 2X = 100*2X + 10X + X - 2 - 495
解方程：2x+4x+6x...+100x=1-(x+3x+5x+...+99x)
1x+2x+3x+4x+5x+6x+7x…+99x=100