P=3a+3bP = 3a + 3bP=3a+3b
Make a a\,a the subject of the formula. Hence, find the value of a a\,a when P=15P = 15P=15 and b=2b = 2b=2.
210 exam-style questions on Eduqas GCSE Maths Changing the Subject of a Formula. Each one has a worked solution and a mark scheme showing where the marks go.