90+1/3x=x怎样算

90+1/3x=x怎样算 小数奥数网xx(x +1)x(x+ 2)x(x +3)=360怎样算? x×(x-1/3)=108/81怎样算 X-(3/1X+5)=15 怎样算 f(x)=3x-(1-x) 怎样求导 x＋1份之x-4=3- x＋1分之3怎样算? 4(2x-1)-3(5x+2)=3(2-x)怎样算? f(x+1)=3x^2-x+1怎样算 X-(1/3x+5)=15 x是多少怎样算 X-(3/1X+5)=15 x是多少怎样算 x+y=36；x-（y-x）=3/4x. 怎样算 2x(2x+5)=(x-1)(2x+5)怎样算? x-1分之x+1 减 x+1分之3X-3 = 2 怎样计算 f(x)=ln(x^3+3x^2+3x+1)怎样化简 40(1+X%)*(1+0.05+X%)=50.6怎样算 3x+7=2.3x怎样算? 7(x-2)=2x+3怎样算 x^8-3x^4+2=0怎样算