2x+(5-3x)=15-(7-5x)
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
初一数学x*x+2x+5的值为7,请求3x*x+6x+3的值.因为x*x+2x2x+3=3x(x*x+2x)+2x+2x
5x/(x+3)(x+2)+(2x-5)/(x-4)(x+3)=(7x-70)/(x+2)(x+4)
解方程(x-2)X(x的平方-6x-9)=x(x-5)X(x-3)
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
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!)+.
2x+3x+4x+5x+x+6x+7x=100
(x/x-1)+(5x-2)/x*x-x=1 求x(有图)
方程 3x(7-2x)+5x(2x-1)=4x(x-3)+56
解方程:6x(7-x)=36-2x(3x-5)x是字母x
x+1分之x+2减去x+3分之x+4=x+5分之x+6减去X+7分之x+8 (解方程)