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How to solve an equation
1.    Trial and error method

We substitute various values for x and stop only when the value satisfies the equation.

2.    Transposition method: Transposing a number means moving an expression to the other side of the equation
    For example, x +2 = 3
    By transposing 2 from LHS to RHS, we get 
        x = 3 –2    (On transposing +2 become –2)
        x = 1
    Some example of transpostions

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