Welcome back!
I have included a detailed solution of two of the questions from the Grade 12 supplementary examination from Feb-Mar 2017.
These are part of the Question 1 on Paper 1 which has been consistent for many years.
These questions draw on your prior knowledge of algebra from previous grades, and include you proficiency in factoring numbers, exponents, signs, and basic algebraic manipulation. However, these are all solvable, and you should be able to gain time in the examination by attending to these questions at the start of the three hours that you have available.
Try these two to get started from this examination:
1.1 Solve for 
Keep checking back often. More to come every day or so.