x+百分之六十x=48
x+0.6x=48
(1+0.6)x=48
1.6x=48
x=48/1.6
x=30
x-百分之二十五x=27
(1-0.25)x=27
0.75x=27
x=27/0.25
x=108
x-百分之三十五x=0.52
(1-0.35)x=0.52
0.65x=0.52
x=0.52/0.65
x=0.8
解方程： x+百分之六十x=48 x-百分之二十五x=27 x-百分之三十五x=0.52
x+百分之六十x=48
x+0.6x=48
(1+0.6)x=48
1.6x=48
x=48/1.6
x=30
x-百分之二十五x=27
(1-0.25)x=27
0.75x=27
x=27/0.25
x=108
x-百分之三十五x=0.52
(1-0.35)x=0.52
0.65x=0.52
x=0.52/0.65
x=0.8