What should be added to the RHS to balance the equation?
4 (6 + x ) = 28 + 4x + ____
In the 1st figure, the left hand side (LHS) and the right hand side (RHS) of the weighing machine are equal to each other. If we add 2 on the RHS, the balance looks like figure 2. What should we do to equalize LHS and RHS again?