Box1 box2 box3
13 11 7
using ony addition and subtraction bring 19 in box1 and 30 in box3

• b1 b2 b3
  13 11 7 (given)
  13 11 6 [1]-[3]=[3] (step 1)
  19 11 6 [1]+[3]=[1] (step 2)
  19 11 30 [1]+[2]=[3] (step 3)
• 9 years agoHelpfull: Yes(7) No(3)
• b1 b2 b3 box no.
  13 11 7 [1]+[2]=[3]
  26 11 7 [1]+[1]=[1]
  19 11 7 [1]-[3]=[1]
  19 11 30 [1]+[2]=[1]
• 9 years agoHelpfull: Yes(4) No(1)
• i think question is not complete
• 9 years agoHelpfull: Yes(0) No(1)
• b1 b2 b3 box No.
  13 11 7 [1] [2] [3]
  19 11 7 [1] + [2] = [1]
  19 11 30 [1] +[2] =[3]
  8 11 30 [1]-[2]=[1]
  19 11 30 [1]+[1]=[1]
• 9 years agoHelpfull: Yes(0) No(3)
• Box1+Box1=Box1 (13+13=26)
  Box1-Box3=Box1 (26-7=19)
  we get 19 in Box1
  Box1+Box2=Box3 (19+11=30)
  we get 30 in Box3
  Done..
  then
• 7 years agoHelpfull: Yes(0) No(3)
• 1. 26 11 17 [1]+[1]=1
  2. 19 11 17 [1]-[3]=1
  3. 19 11 30 [1]+[2]=3
• 7 years agoHelpfull: Yes(0) No(0)