Rules of Balances

Rules of Balances

This puzzle deals with numbers and arithmetic. The requirement to play is simple: you only need to know addition and substraction. On each side of a balance are disposed numbers, between each number appear a box. You must put  a plus sign (+) or minus sign (-) in each box in a way that each side is equal. This is the puzzle.

Balance

  

And this is the solution ( the total is inside the triangle).

Solution of the puzzle

This puzzle is very simple, My childreen liked these puzzles but I did not tell them that is was arithmetic.