x-1/4.6=0.5/0.23

（x-1）:0.5=4.6:0.23 x-1/4.6=0.5/0.23 求x:|x|-|x-4|=0.5x-1 x=1+0.5x+0.25x+0.125x+0.0625x求x的值 先化简再求值先化简再求值：（x-x/x+1）(x+1/x^2+4x+4)(x^2-4/x^2-2x),其中x=-0.5 (x+2)(x-1)+(x+3)(x+1)=x·x-1 求x (5x-4)(2x+5)(3x-6)(2x-4)=(2x-4)(2x+5)·0.5 求x 解比例：（x-1）：4.6=0.5:0.23 4.6分之x-1=0.23分之0.5解比例 0.5x(x+2)=1-x(3-.05x) X=? X(X-1)=X (X-4)(x-2)-2(X-1)(X+3)其中X=-0.5 12x-2/21x=快点9点之前还有7x-x+2/3x-3(4x-0.5)-2x+(3x-1)-(x+5) x-2/0.2-x+1/0.5=3 x=? (x+40)/60-x/40=1+0.5,x=? x-2/0.2-x+1/0.5=3求x mathematica软件,已知y[x],Y=f1(x),X(x)=f2(x),如何plot Y[X]?y[x_] := x + 9.81/2*x*xk=1X[x] = x - k*y'[x]/(1 + (y'[x])^2)^0.5Y[x] = y[x] + k/(1 + (y'[x])^2)^0.5Plot[{y[x],Y[X],},{x,0,2}] 0.5x(x-1)=136,求x的值 0.5x(x-1)=136,求x的值 x-0.5x-1/0.6=1