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By the end you can solve linear equations, inequalities and pairs of simultaneous equations without guessing — and say why every step you took was allowed.
You can get the right answer sometimes and you are not sure why, or you lose marks on working rather than on results.
Sign in and every step you finish is saved to your Passport.
Most algebra errors are arithmetic errors wearing letters. Clearing this now means that when a later answer is wrong, it is telling you something real about the algebra.
Open this stepOrder is the one rule that makes an expression mean a single thing. Without it every later step is luck, so it comes before anything with an unknown in it.
Open this stepNow the ground is solid, real algebra is safe to attempt — isolate the letter, one legal move at a time.
Open this stepReordering someone else's working proves you understand why the sequence is what it is, not just that following it produces answers. It is the check that the previous step actually landed.
Open this stepAn inequality is an equation with exactly one extra rule. Teaching that rule against an already-solid base is what stops it being memorised as an unexplained exception.
Open this stepThe end, and the natural one: everything above, composed. A system is only hard if any single step above is still shaky, which is why it is last.
Open this stepYou finish able to solve an equation you have not seen before and justify each line — which is the part that actually transfers to physics, chemistry and every exam after this one.
Once you have started this course it stays available to you, with your progress intact, even if it is later replaced.