Question

Afla numerele a,b ,c,stiind ca;
a+b=300
b+c=500
a+c=400
REZOLVARE DE CLASA A-IV-A

Answer 1

a+b=300
b+c=500
a+c=400
-------------- +
a+b+b+c+a+c=300+500+400
2a+2b+2c=1200
2(a+b+c)=1200
a+b+c=600

a+b+c=600
a+b=300
---------------- -
c=600-300
c=300

a+c=400
a+300=400
a=400-300
a=100

a+b=300
100+b=300
b=300-100
b=200