Suma a 3 numere este 1.cat este al doilea numar, daca primul este ,iar al treileaeste dublul primului? ?

Hypotheticly a is the first number, b the second and c the last one.

a=9999, c=2a

a+b+c=100 000

if a+1=10 000 (no letter) then c= 2×(a+1-1)=2×(a+1)-2 so

a+1+b+2×(a+1)-2=100 000

b=72 000

the second number is as good as 72 000

i did it myself and i got 4.2 (b) hope its right

step-by-step explanation: