解方程0.5分之0.4x-1.1+2分之x-5=0.03分之0.03+0.02x
(0.4x-1.1)/0.5+(x-5)/2=(0.03+0.02x)/0.03
(4x-11)/5+(x-5)/2=(3+2x)/3
6(4x-11)+15(x-5)=10(3+2x)
24x-66+15x-75=30+20x
19x=171
x=9