Question

0.3/0.03+0.02x=0.5/0.4x+0.9-2/x-5,怎么解

Answer 1

(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.