解方程 x-3%x=4.9 （1+25%）x=56 4分之3x-25%=2 60+20%x=100
问题描述：
解方程 x-3%x=4.9 （1+25%）x=56 4分之3x-25%=2 60+20%x=100
答
x-3%x=4.9
x-0.03x=4.9
0.97x=4.9
x=4.9/0.97
x=490/97
x=5又5/97
（1+25%）x=56
1.25x=56
x=56/1.25
x=44.8
4分之3x-25%=2
3/4x=2又1/4
x=9/4÷3/4
x=3
60+20%x=100
0.2x=100-60
0.2x=40
x=40/0.2
x=200
答
x-3%x=4.9 0.97x=4.9x=4.9/0.97x=490/97（1+25%）x=56x=56÷1.25x=44.84分之3x-25%=20.75x=2+0.250.75x=2.25x=2.25÷0.75x=360+20%x=1000.2x=100-600.2x=40x=40÷0.2x=200