In an equation, each letter stands for a missing number. To solve an equation, find the values of the missing numbers.
The best way to solve an equation is by using 'inverses', or undoing what the equation is doing.
To use this method to solve equations remember that:
When you use this method you must perform the same action on both sides.
Solve the equation: x - 6 = 9
To get x on its own, we need to add 6. If you add 6 to one side of the equation, you need to add 6 to the other side of the equation.
Solve the equation 2y = 6 to find the value of y.
To get y on its own, we need to divide it by 2. As you already know, you must always perform the same operation on both sides of the equation.
The following is an example of a typical exam question:
Solve the equation: 2a + 3 = 7
Sometimes you need to use the inverses method more than once to solve an equation.
Here is how to solve 2a + 3 = 7 using inverses.
The answer is: a = 2
Now try this question.
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