990/x-990/(x+10%)=60/45 即[990(x+10%)-990x]/x(x+10%)=4/3 化简得:4/3x^2+2/15x-99=0不会.
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990/x-990/(x+10%)=60/45即[990(x+10%)-990x]/x(x+10%)=4/3化简得:4/3x^2+2/15x-99=0不会.990/x-990/(x+10%)=60/4
990/x-990/(x+10%)=60/45 即[990(x+10%)-990x]/x(x+10%)=4/3 化简得:4/3x^2+2/15x-99=0不会.
990/x-990/(x+10%)=60/45 即[990(x+10%)-990x]/x(x+10%)=4/3 化简得:4/3x^2+2/15x-99=0
不会.
990/x-990/(x+10%)=60/45 即[990(x+10%)-990x]/x(x+10%)=4/3 化简得:4/3x^2+2/15x-99=0不会.
第一步[990(x+10%)-990x] =99
第二步 x(x+10%)= x^2 +1/10X
第三步99/x^2 +0.1X =4/3
4* x^2 +0.4X =3*99
4* x^2 +0.4X -297=0
再除以个 3 结果就是那么多了
990/x-990/(x+10%)=60/45 即[990(x+10%)-990x]/x(x+10%)=4/3 化简得:4/3x^2+2/15x-99=0不会.
x/(120-x)=x/60
12x(x+x)=60 X=?
x+2x+(x+10)=90,x=?
x+(x+20)+(x-10)+70+x=540 .
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
已知x^2+5x-990=0,求x^3+6x^2-985x+10的值
(x+x)+(x-x)+(x/x)=11.2
x/50-3=x/60+2 (15+25/x)=120/10+x
8x+12×(x-3)=2646x+10×(8-x)=60
解下列方程!就三道!解下列方程.1、x/x-2 - 1-x²/x²-5x = 2x/x-3(x/x-2 - 1-x²不是一起的!)2、5x/x²+x-6 - 5-2x/x²-x-12=7x-10/x²-6x+8(5x/x²+x-6 - 5-2x不是一起的!)3、x-4/x-5 + x-8/x-9=x-7/x-
x^2+5x-990=0,求x^3+6x^2-985x+2010
10X+(X-3)+10(X-3)+X+X+(X-3)=156 X=8
解方程 40%x=12 (1+60%)x=24 (1-37.5%)x=10 2x+50%x=20 40%x+30%x=140 35%x-15%x=72
12=( )X( )X( ) 60=( )X( )x( )X( )
若int x for(x=10,x>3,x--){if(x%3)x--,--x,--x,printf(“%d”,x):}
解方程.(5x/x²+x-6)+(2x-5/x²-x-12)=7x-10/x²-6x+8
x+(x-1)+(x+1)+(x+10)+(x-10)=440