(1+0.8%)x+(1+1.1%)×(42-x)=(1+1%)×42

解方程((13x-x^2)/(x+1))(x+(13-x)/(x+1))=42 (13x-x^2)/(x+1)[x+(13-x)/(x+1)]=42 x/2+x/6+x/12+x/20+x/30+x/42=1 x-4/1x=8/3 x-0.8x=22 3/2x+2/1x=42 解方程：x-1/2x=42 x-2/5x=3/8 x+0.8x=36 45-1/2x=5 (1)3x(x+0.2)=4x(x-1.1) x(x+1)=42解方程 x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x 解方程X-1/5X=24 X-1/8X=42 X-1/9X=64 解方程:x+1分之13x-x^2*(x+(x+1分之13-x))=42 X/2+X/6+X/12+X/20+X/30+X/42=1用简便方法解 x/x平方-x+2=2x/x+1