Răspuns :
fie x , suma avuta initial
atunci
cheluie x/2 raman x/2
apoi mai cheltuie x/2:2=x/4
deci
x/2+x/4+125=x
125=x/4
x=4*125
x=500
verificare
500/2+500/4+125=250+125+125=500 adevarat
atunci
cheluie x/2 raman x/2
apoi mai cheltuie x/2:2=x/4
deci
x/2+x/4+125=x
125=x/4
x=4*125
x=500
verificare
500/2+500/4+125=250+125+125=500 adevarat
S = |__|__|__|__|
S/2= |__|__|
raman:|__|__|
(S/2)/2= |__|
raman: |__| = 125 lei
inseamna ca: S = 4*|__| = 4*125 lei = 500 lei
S/2= |__|__|
raman:|__|__|
(S/2)/2= |__|
raman: |__| = 125 lei
inseamna ca: S = 4*|__| = 4*125 lei = 500 lei