( )÷8=( )/( )=15:( )=0.75=( ):12=( )%

( )÷8=( )/( )=15:( )=0.75=( ):12=( )%
( )÷8=( )/( )=15:( )=0.75=( ):12=( )%

( )÷8=( )/( )=15:( )=0.75=( ):12=( )%
( 6)÷8=(3 )/( 4)=15:( 20)=0.75=(9 ):12=( 75)%

( 6)÷8=( 3)/(4)=15:(20)=0.75=(9):12=(75 )%

丽丽补给梅梅13元，每盒英语录音磁带要多少元？ 各自付了10盒磁带钱，13/（10-8）=6.5 想不通的话设每盒x元丽丽12x，小梅8x，两人各实付10x