0.3:2X=1:6
2X=1.8
X=0.9
50—X/4=0.8:1/2
25-X/2=3.2
X/2=25-3.2
X=43.6
49:(10—X)=14:2
140-14X=98
14X=42
X=3
1/15:1/5=1/X:1/3
15/5=X/3
X=9
0.3:2X=1:6
2X=1.8
X=0.9
50—X/4=0.8:1/2
25-X/2=3.2
X/2=25-3.2
X=43.6
49:(10—X)=14:2
140-14X=98
14X=42
X=3
1/15:1/5=1/X:1/3
15/5=X/3
X=9