解方程x+5/9=17/18 x+5/6=11/12 6/7-x=1/6 2/3+x=7/9 7/8-x3/4 0.48x+12=48
解方程x+5/9=17/18 x+5/6=11/12 6/7-x=1/6 2/3+x=7/9 7/8-x3/4 0.48x+12=48
日期:2014-08-28 12:22:30 人气:1
x+5/9=17/18
两边乘以18
2x+10=17
x=7/2
x+5/6=11/12
两边乘以12
2x+10=11
x=1/2
6/7-x=1/6
两边乘以42
36-42x=7
42x=29
x=29/42
2/3+x=7/9
两边乘以9
6+9x=7
x=1/9
[7/8-x3/4=?]
0.48x+12=48
两边除以0.12
4