(1)3/5*1/2+2x=2/5
2x=2/5-3/10
2x=1/10
x=1/10*1/2
x=1/20
(2)x+4x/9=5.2
13x/9=26/5
x=26/5*9/13
x=18/5
(3)x-4/5-6=16
x=16+6+4/5
x=22又4/5
(1)3/5*1/2+2x=2/5
2x=2/5-3/10
2x=1/10
x=1/10*1/2
x=1/20
(2)x+4x/9=5.2
13x/9=26/5
x=26/5*9/13
x=18/5
(3)x-4/5-6=16
x=16+6+4/5
x=22又4/5