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Make $a$ the subject of the formula $p = 3a - 9$ - Edexcel - GCSE Maths - Question 1 - 2022 - Paper 3

Question 1

Make $a$ the subject of the formula $p = 3a - 9$

Worked Solution & Example Answer:Make $a$ the subject of the formula $p = 3a - 9$ - Edexcel - GCSE Maths - Question 1 - 2022 - Paper 3

Step 1

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Answer

To isolate $a$ , we start with the original equation:

$p = 3a - 9$

We can rearrange this by adding 9 to both sides to eliminate the constant term:

$p + 9 = 3a$

Step 2

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Answer

Now, we divide both sides by 3 to isolate $a$ :

$a = \frac{p + 9}{3}$

Thus, we have successfully made $a$ the subject of the formula.

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