3(x-1.4)+x=7.8
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3(x-1.4)+x=7.83(x-1.4)+x=7.83(x-1.4)+x=7.8=>4x-4.2=7.8=>4x=12=>x=3真郁闷
3(x-1.4)+x=7.8
3(x-1.4)+x=7.8
3(x-1.4)+x=7.8
=> 4x-4.2=7.8
=> 4x=12
=> x=3
真郁闷
3(x-1.4)+x=7.8
用递归法求y=x-(x*x*x/3!)+(x*x*x*x*x/5!)-(x*x*x*x*x*x*x/7!)+.
3x*x=1600+x*x-80x
(X+1)X(X+2)X(X+3)=504
一个“整式的乘法”的问题请先阅读下列解题过程,再仿做下面的问题.已知X*X + X - 1=0,求X*X*X + 2*X*X + 3的值.解X*X*X + 2X*X +3=X*X*X +X*X -X +X*X +X +3=X{X*X +X -1} +X*X +X -1 +4=0+0+4=4+ x + X*X + X*X*X=0.+ X*X + X*X*X
2.4x-1.4x+3x+2.4=0
2.4x-1.4x-3x=5.2-8
2.4x+1.4x+2.4=3x
4x-1.4x-3x+2.4=02.4x-1.4x-3x+2.4=0
7.8X-3(X+5.6)=25.6
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
如果3x*x-x=1那么9x*x*x*x+12x*x*x-3x*x-7x+2001等于多少
21分之10x÷3分之2=7分之3x-3分之1x-2分之1x=190x-53x=7408.5x-6.9x=43.3x-200=0.2x+1101.02+0.4x+2.6x=3.428.9x-67=4.5x+656x-58=3x+1410x-20=5x+806x+5=10x-3420-1.4x=9.8x-288.2x+5.4x=272
用因式分解法解下列方程1.4x^2-x-5=02.(x^2-x)(x^2-x-3)+3(x^2-x)=4
3*X*X*X+3*X*X-3x-9=0 x=?
(x-3/x-2)-(x-2/x-1)=(x-5/x4) -(x-4/x-3)
（X+X)+(X-X)+(X*X)+(X/X)=100
解方程x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6)