[0.25÷(x+0.2)-0.25]×3.82+1=1 120[0.25÷(x+0.2)-0.25]×3.82+1=1 120×40%+120×9/20+x=120 81x-342=76(x-2)
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[0.25÷(x+0.2)-0.25]×3.82+1=1 120[0.25÷(x+0.2)-0.25]×3.82+1=1 120×40%+120×9/20+x=120 81x-342=76(x-2)
[(x²-3x-6)/(x+2)-1]÷(x²-4)/(x²+4x+4)
要列式1/12x(-6)+(-1/2) 4x1x(-5) 3x(-2)x(-6)x(-5) (-5)x 8 x(-6)x(-0.25) (-0.125)x (-7) x 5 x(-16) (8/15)x 1.25 x 9/2(-3)x 5/6 x(-0.2)x(-2/7) (-2)x(-6/5)x 10/3 x(-1/4) (-19/14)x 3
x-0.25x=2.8+0.2解放程1.26-2x=0.74 1.3x+1.5x=0.14 x÷8=0.06
0.3x+7x-0.25x=21.58.7×(36-x)=04(不知道是x还是× 都解了吧)x或者×(x+0.2)=1.27(x+6)-3x=4x(2x+5)3(x+2)=4(x+1)18-4x=2x-63.8x+1.2x=256x+1.5x=15呼呼.累死我了 着急
证明f(x)=[√(1 x²) x-1]证明f(x)=[√(1+x²)+x-1]÷[√(1+x²)+x+1]是奇函数
不等式(2x-0.5)÷0.5-(2x-1.4)÷0.2>(0.5-x)÷0.25
8x-[-3x-(2x-7x-5)+3]+4x化简
16+0.2x=0.25x十9求x!
0.2x=0.25x-0.8
设稻田有x公顷x-0.25x-0.2(x-0.25x)=6解得:x=10
0.25x=0.5(13-x)
先化简,后求值:[(x-y)²+(x-y)(x-y)]÷2x,其中x=3,y=1.5
[x(x^2y^2-xy)-y(x^2-x^3y)]÷3x^2-y
2012贵州先化简1/x+1-3-x/x2-6x+91/(x+1)-[(3-x)/(x^2-6x+9)]÷[(x^2+x)/(x-3)]=1/(x+1)+[(x-3)/(x-3)^2][(x-3)/(x^2+x)]=1/(x+1)+1/(x^2+x)=1/(x+1
1/5x+1/4(440_x)=100求X值设男生x人,女生(400-x)人.1/5x+1/4(440-x)=1000.2x+110-0.25x=1000.25x-0.2x=110-1000.05x=10x=200
x>o,请将下列算式,按从小到大的顺序排列:x÷1.2,0.4x,x÷0.25,x+x+x,7.5x
x>0,请将下列算式按从小到大的排序排列;x÷1.2,0.4x,x÷0.25,x+x+x,7.5x.