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a+b=300
b=c×9
c=d+13
d=e:6
e:6=16


Răspuns :

e=16x6=96
d=96:6=16
c=16+13=29
b=29x9=261
a=300-261=39
e=16x6
e=96
d=96:6
d=16
c=16+13
c=29
b=29x9
b=261
a+b=300
a=300-261
a=39