X+0.1X+(100-2X)*0.5=54.2解解更健康

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X+0.1X+(100-2X)*0.5=54.2解解更健康
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X+0.1X+(100-2X)*0.5=54.2解解更健康
X+0.1X+(100-2X)*0.5=54.2解解更健康

X+0.1X+(100-2X)*0.5=54.2解解更健康
X+0.1X+(100-2X)*0.5=54.2
x+0.1x+50-x=54.2
0.1x=54.2-50
0.1x=4.2
x=4.2÷0.1
x=42

（X+X)+(X-X)+(X*X)+(X/X)=100 x-2x+3x-4x+5x.+99x-100x=25求解 2x+3x+4x+5x+x+6x+7x=100 x+2x+3x+.+100x f(x)=x^2+x (x x+2/2x+2-x/2x=0.(x 2/2x 2)- (x/2x)=0.1 1/X(X+1)+1/(X+1)(X+2)+1/(X+2)(X+3).+1/(X+99)(X+100)= 解方程：2x+4x+6x...+100x=1-(x+3x+5x+...+99x) 1X+2X+3X…+98X+99X+100X=50500X X等于多少? 1x+2x+3x+4x+5x+6x+7x…+99x=100 100(X - 2) + 10X + 2X = 100*2X + 10X + X - 2 - 495 100×2x+10x+3x+216=100×3x+10×2x+x 设函数f(x)=(x-1)(x-2)...(x-100)(x>100),求F'(X) f(x)=x(x-1)(x-2)…(x-99)(x-100),求f'(100) 解方程:x-2x+3x-4x+...+99x-100x=25 解方程：x-2x+3x-4x+.+99x-100x=25 x-2x+3x-4x+...+99x-100x=25 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