X-12.56=15.7
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X-12.56=15.7X-12.56=15.7X-12.56=15.7X-12.56=15.7x=12.56+15.7x=28.26
X-12.56=15.7
X-12.56=15.7
X-12.56=15.7
X-12.56=15.7
x=12.56+15.7
x=28.26
X-12.56=15.7
x×x×3.14=12.56
（X+X)+(X-X)+(X*X)+(X/X)=100
26.4x+18x=66.6 0.5×6+3x=4.8 2.5x-6=18.5 x-12.56=15.7 3.6+5.4x=273.6×5-0.5x=8.5
x-12.56= 15.7解方程
8X-3.2+2X=15.7
x*x*x*x*x=80000?
一元二次方程 （3.14×2x÷4）＋x＋（3.14x²÷x）＋（3.14x²÷x－x）=15.7
x*x*x=504 x*x*x=504
（x+x）+(x-x)+(x/x)=11.2
f(x)=x,x
x+x=x+15
X(X-1)=X
180=( )x( )x( )x( ) ×( )
(x+30)*(x-18)=x*x
x+ x+(x*50%)=1.5X?
f(x)=x^2+x (x
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!)+.