1/8【x+1/2】=75%

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1/8【x+1/2】=75%1/8【x+1/2】=75%1/8【x+1/2】=75%1/8【x+1/2】=75%x+1/2=75%*8x+1/2=6x=6-1/2x=5又1/2

1/8【x+1/2】=75%
1/8【x+1/2】=75%

1/8【x+1/2】=75%
1/8【x+1/2】=75%
x+1/2=75%*8
x+1/2=6
x=6-1/2
x=5又1/2