(0.4x-15)/30=(0.6x+15)/50
(0.4x-15)/3=(0.6x+15)/5
(0.4x-15)*5=(0.6x+15)*3
2x-75=1.8x+45
0.2x=120
所以x=600
很详细的过程了
两边乘150
5(0.4x-15)=3(0.6x+15)
2x-75=1.8x+45
2x-1.8x=45+75
0.2x=120
x=120÷0.2
x=600
(x×40%-15)÷30=(x×60%+15)÷50
(4/10x-15)÷30=(6/10x+15)÷50
4/300x-0.5=6/500x+0.3
4/300x-6/500x=0.8
2/1500x=0.8
x=600
(x×40%-15)÷30=(x×60%+15)÷50
解:(0.4x-15)×5=(0.6x+15)×3
2x-75=1.8x+45
0.2x=120
x=600