X+20%X+(X+20%X)5%=50000 X是多少
(x-22)+(x-24)+(x-27)+(x-20)=x
4x-3x(20-x)=5x-7x(20-x)
4x-3x(20-x)=5x-7x(20-x)的解法
(x+2005)/ (x+2004)+(x+2007)/(x+2006)=(x+2008)/(x+2007)+(x+20
(X+X)+(X-X)+(X*X)+(X/X)=100
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!)+.
0.88(X+20%X)=X+84
1X?+2X?+3X?+4X?+5X?+6X?+7X?+8X?+9X?+10X?=1980求?是多少
(1)16x-40=9x+16是多少?(2) 4x=20/3x+16 (3)2(3-x)=-4(x+5) (4)3(-2
5x/64-x/25=15 x是多少
7x-6+5x+1=4x+3-2x求x是多少
X+1-3X=5X+10 6-3X=5X-20