(5-7x)/8=(7-5x)/7
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
(x+12)(x-2)+(x+7)(x+8)-(x+5)(x-10),其中x=2
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!)+.
x-4/x-5 - x-5/x-6=x-7/x-8 - x-8/x-9求x=?
X-5+8*X=7*X-2*X-1
解方程: x-5/x-6+x-8/x-9=x-7/x-8+x-6/x-7 过程!
x-4/x-6+x-8/x-10=x-5/x-7+x-7/x-9
(3-x)/(1-x)-(5-x)/(7-x)+(x^2-x)/(x^2-8x+7)=1
求方程解x-5/x-4+x-9/x-8=x-8/x-7+x-6/x-5
x-4/x-5-x-7/-x-8=x-5/x-6-x-8/x-9
解分式方程:(x-4)/(x-5)+(x-8)/(x-9)=(x-7)/(x-8)+(x-5)/( x-6)
解分式方程(X-4)/(X-5)-(X-5)/(X-6)=(X-7)/(X-8)-(X-8)/(X-9)