0.4x+0.9/0.5-0.03-0.02x/0.03-x-5/2=0

0.4x+0.9/0.5-0.03-0.02x/0.03-x-5/2=0
0.4x+0.9/0.5-0.03-0.02x/0.03-x-5/2=0

0.4x+0.9/0.5-0.03-0.02x/0.03-x-5/2=0
0.4x+0.9)/0.5--(0.03+0.02x)/0.03=(x--5)/2
(4x+9)/5-(3+2x)/3=(x-5)/2,
6(4x+9)-10(3+2x)=15(x-5),
24x+54-30-20x=15x-75,
(24-20-15)x=-75-54+30,
-11x=-99,
x=9.

楼主可以打一下括号么？看不懂