0.1-0.2x/0.3=0.3x+0.1/0.7-3
0.1-0.2/0.3 x =0.3x +1/7-3
0.1-2/3x=0.3x -20/7
0.3x+2/3x=0.1+20/7
23/30 x =207/70
x= 207/70 ×30/23 =621/161
0.1-0.2x/0.3=0.3x+0.1/0.7-3
0.1-0.2x/0.3=0.3x+0.1/0.7-3
0.1-0.2/0.3 x =0.3x +1/7-3
0.1-2/3x=0.3x -20/7
0.3x+2/3x=0.1+20/7
23/30 x =207/70
x= 207/70 ×30/23 =621/161