25%x-12.5%x=9.
25%x-12.5%x=9.
(X+X)+(X-X)+(X*X)+(X/X)=100
x+12.5=3.5x
x-60%x-25%x=25%x-30
x-30%x=14x+25%x=20
(25/X)X(30/X)= 15/X怎么算
x-2x+3x-4x+...+99x-100x=25
解方程:(2x+5)(4x*x-10x+25)=8x(x*x+1)
x+x=x+15
(x+3)(x-4)-x(x-2),化简求值,其中x=12.5
解分式方程:4/5x+x/(5x-25)=5/(x^2-5x)
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!)+.