Question

(15-9+8)-(a-b)+b=42,iar b si a sunt numere cosecutive pare.

Answer 1

15-9+8=14  b=a+2(numere pare consecutive)
-(a-b)=-a+b
de aici rezulta: 14 -a+b+b=42
-a+2b=-28
-a+2a+4=-28
a=-24
b=-22
cred ca ii bine

Answer 2

15-9+8=14   b=a+2           (a-b)=a+b      14-a+b+b=42     a+2b=28    a+2a+4=28      a=24    b=22