a=3c−2a = 3c - 2a=3c−2
Verify that c=a+23\displaystyle c = \frac{a + 2}{3}c=3a+2 is the subject of the formula.
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.