(x+0.2)/0.25=500
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(x+0.2)/0.25=500
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
(x+x)+(x-x)+(x/x)=11.2
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
(0.2-x)(500-100x)=120
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
0.25x=0.5(13-x)
(过程)2.4-x=0.2x
17-7(X-0.2)=X
求1/2x^2-1/4x+0.2x^3+0.25x-0.5x^2-1/5x^3+0.5x-1 其中x=12/13
求1/2x^2-1/4x+0.2x^3+0.25x-0.5x^2-1/5x^3+0.5x-1 其中x=12/13
x*x*x*x+2008x*x+2007x+2008(提示:x*x*x-1=(x-1)*(x*x+x+1))
解方程一.0.2x=0.25x-18 二.0.3x+x=69
解方程一.0.2x=0.25x-18 二.0.3x+x=69
(X-0.25X)+(180-X)+0.2*(180-X)=180怎么解?
如果(x-a)(x+0.5)=x^2-0.25,那么x等于几