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Ana si Ina aveau impreuna 50 de lei. Dupa ce Ana a primit 13 lei ,iar Ina a cheltuit 25 de lei ,cele 2 fete au sume egale. Ce suma a avut fiecare la inceput?

Răspuns :

Miky93ask
a+i=50

a+13=i-25

a=i-25-13

a= i-38

i-38+i=50

2i=50+38

2i=88

i= 44 lei are Ina

a=50-44
a=6 lei are Ana
Petrwask
fie x=suma egala pe care ar avea-o
x-13-bani are Ana9
x+25-bani are Ina
x-13+x+25=50
2x`+12=50
2x=38
x=19
19-13=6(bani are ana)
19+25=44(bani are ina

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