P=3a+3bP = 3a + 3bP=3a+3b
Make a a\,a the subject of the formula.
Practise Eduqas GCSE Maths Changing the Subject of a Formula with exam-style questions for Foundation and Higher tier. 80 questions, matched to the Eduqas GCSE Maths (C300QS) specification and written in Component 1 and Component 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.