3/8:x=5%:0.6
3/8*5%=5%x
3/160=5%x
x=4.5
7:4.2=(x+7):9
1/0.6=(x+7)/9
9=0.6x+4.2
x=4.8/0.6
x=8
1/6x:3/4=7:1又2/5
1/6x*4/3=7/(7/5)
2/9x=5
x=22.5
4又1/2:1又2/7=1又1/3:(4-x)
(9/2):(9/7)=4/3:(4-x)
7/2*(4-x)=4/3
14-7x/2=4/3
7x/2=12又2/3
7x=76/3
x=76/21
3/8:x=5%:0.6
3/8*5%=5%x
3/160=5%x
x=4.5
7:4.2=(x+7):9
1/0.6=(x+7)/9
9=0.6x+4.2
x=4.8/0.6
x=8
1/6x:3/4=7:1又2/5
1/6x*4/3=7/(7/5)
2/9x=5
x=22.5
4又1/2:1又2/7=1又1/3:(4-x)
(9/2):(9/7)=4/3:(4-x)
7/2*(4-x)=4/3
14-7x/2=4/3
7x/2=12又2/3
7x=76/3
x=76/21