Question

Daca a+ b=999, iar a- b=1, AFLA CE valoare are a.dar b.

Answer 1

a+b=999
a-b=1 ,rezulta a=b+1
avem ecuatia:b+1+b=999
2b=999-1
2b=998
b=998:2
b=499
a=499+1=500

Answer 2

a+b=999 => b= 999-a
a-(999-a)=1
a-999+a=1
2a-999=1
2a=1+999
2a=1000
a=1000:2
a=500

500-b=1 => -b= -499 |*(-1)
b=499
Sper ca te-am ajutat !!