The number of hours John spends on studying is normally thre
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The number of hours John spends on studying is normally three times that of Simon.This week,each of them spends 6 hours more on studing.As a result,John spends 12 hours more than Simon.How many does
a.John normally spend on sthdying in a week?
b.Simon normally spend on studing in a week?
a.John normally spend on sthdying in a week?
b.Simon normally spend on studing in a week?
为了叙述方便,我用J代表John,S代表Simon
normally:J=3S
this week:J+6-(S+6)=12
所以 J-S=12
2S=12
S=6
即J=3*6=18
normally:J=3S
this week:J+6-(S+6)=12
所以 J-S=12
2S=12
S=6
即J=3*6=18
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