2.2x-x=0.
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2.2x-x=0.2.2x-x=0.2.2x-x=0.2.2x-x=0.31.2x=0.3x=0.3/1.2x=1/4=0.25
2.2x-x=0.
2.2x-x=0.
2.2x-x=0.
2.2x-x=0.3
1.2x=0.3
x=0.3/1.2
x=1/4=0.25
2.2x-x=0.
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
（X+X)+(X-X)+(X*X)+(X/X)=100
2.2X=75+X,
16^X - 12^X -9^X = 0.求X.
(98-X)+(100-X)+X=X/0.
x-0.25x=0.
x+4.5x=0.
X-0.25x=0.
4.8x-x=0.
X-0.25x=0.
120X-X=0.
x-0.4x=0.
1.2x-x=0.
X-0.48X=0.
x*x*x*x*x=80000?
x+2/2x+2-x/2x=0.(x 2/2x 2)- (x/2x)=0.1
f(x)=x,x≥0.f(x)=x+a,x