X-80%=25%x14 1/2X+30%X=4/5÷20% (1-X):4=0.5:8 1/2+

2025-05-13 23:00:50
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回答1:

X-80%=25%x14
x-0.8=3.5

x=4.3

1/2X+30%X=4/5÷20%
0.8x=4
x=5

(1-X):4=0.5:8
8(1-x)=2
1-x=1/4
x=3/4

1/2+20%X=0.875
0.5+0.2x=0.875
0.2x=0.375
x=1.857

4/9X-12x85%=3/8
4/9x-51/5=3/8
4/9x=423/40
x=3807/160