解方程：3/8x+5/12x=38/41 x-75%x=54 化简比：3/4:1/5 0.95:1/4 0.6:0.72 11/12:22/21

3/8x+5/12x=38/41 9/24x+10/24x=38/41 19/24x=38/41 x=48/41
x-75%x=54 25%x=54 x=54/25% x=216
3/4:1/5=(3/4)*5:1=15:4
0.95:1/4=95:25=19:5
0.6:0.72 =6:72=1:12
11/12:22/21=1/12:2/21=21/12:2=21:24=7:8
2/3x÷3/4=4/9 2/3x=(4/9)*(3/4) 2/3x=1/3 x=1/2
1/4x+1/2=3/5 1/4x=3/5-1/2 1/4x=1/10 x=2/5
2/3x-1/5x=7/10 10/15x-3/15x=7/10 7/15x=7/10 x=3/2