递等式,解方程

显示全部楼层 · 2010-1-23 12:15:58

X－ X= 2X + =
70%X + 20%X = 3.6X×=20×
25% + 10X =
X - 15%X = 68X＋X＝121
5X－3×＝
X÷＝126X＋5 =13.4
3X=X÷=
X＋X=
4X－6×=2÷X=
X =
X = × X÷ =×
4x－3 ×9 = 29x + x = 4X－21×=4
6X＋5 =13.4
X-X=
4χ－6＝385X=
X=
X÷=X÷=12
X=
X=×X÷=÷
X-0.25=
=30% 4+0.7X=102
X+X=42
X+X=105X-X=400
X-0.125X=8
= X+X=18
X×( + )=
x－0.375x= x×+=4×
X－X＝12
5 X－2.4×5＝80.36×5- x =
(x- 4.5) = 7 x- 25%x = 10x- 0.8x = 16+6
20 x– 8.5= 1.5
x- x -4= 21X＋25%X=90
X－X=

千问 · 2010-1-23 12:15:58

5x+2x=14(5+2)x=14
7x=14
x=14/7
x=2

千问 · 2010-1-23 12:15:58

5x+2x=14