Question

[510(1-4%)-(400-X)](1+10%)300=(510-400)300怎么解

Answer 1

原方程两边同除以300,可得：

[510(1-4%)-(400-X)](1+10%)=510-400

即(510-510*0.04-400+X)*1.1=110

110-20.4+x=100

解得x=10.4