(11x+330)/(5x+330)=11/6
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
已知2x*x+x-5=0,求代数式6x*x*x+7x*x-13x+11的值
解方程:11(6-x)/3(x-4)=10(5-x)/3(x-4)-5(6-x)/x-2
先观察下列各式,(x+5)(x+6)=x²+11x+30 (x-5)(x-6)=x²-11x+30
1)7.6X-3.6X(6X-5)=4,求X 2)5X-2X(X-4)=11,求X
(2x-1)/(x-1)(x-2)=(x-5)/(x-2)(x-3) x/2x^2-11x-21=(x+7)/x^2-1
求x^2-3x/x^2-6x+9*x^2-11x+30/x^2-5x-1
解方程:5x(x+7)(x+4)=5x(x的平方+11x)
5x(x+7)(x+4)=5x(x^2+11X)
解方程5题3x+7x=9x+84x-3(20-x)=6x-7(11-x)2x+(x-1/3)=1-(x-2/5)3x+2
1+2x+3x^2+4x^3+5x^4+6x^5+7x^6+8x^7+9x^8+10x^9+11x^10当x=-1时的值
6x-11=2.9-4x 5(2x-2)-6=6x-15