To solve an equation, one must find the value of the variable that makes both sides equal. Any operations performed on one side must also be performed on the other side. A simple example of solving the equation 2x + 3 = 11 is shown, which involves subtracting 3 from both sides, then dividing both sides by 2 to isolate the variable x, resulting in the solution x = 4.

1. EQUATIONS (1º E.S.O.) Things we mustn't forget to solve an equation Example (a very simple one)

2. To solve an equation means finding a value for the variable that makes the equation true. Whatever you do to one side of the equation, you must also do it to the other side, to keep it in balance. Things we mustn't forget to solve an equation

3. E xample Solution: Worked example (A VERY SIMPLE ONE) Solution: Solve the equation 2x + 3 = 11 2x + 3 = 11 - 3 - 3 1) Subtract 3 from both sides Solve the equation 2x + 3 = 11 2x+3 = 11 = 2x = 8 =

4. 2) Divide both sides by 2 3) So x = 4 2x = 8 = 2x 8 __ __ = 2 2 x = 4 =

5. Check the solution 2x + 3 11 2(4) + 3 8 + 3 11 Left-hand side = Right-hand side Therefore, x = 4 is the correct solution Check: x = 4 x 4 =