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QLDMath MethodsQuick questions
Unit 1: Algebra, statistics and functions
Quick questions on Simultaneous equations (QCE Math Methods Unit 1)
4short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is sign error during elimination?Show answer
Track signs carefully when subtracting equations.
What is forgetting to back-substitute?Show answer
Solving for one variable is half the job.
What is calling identical lines "no solution"?Show answer
Identical lines have infinitely many solutions.
What is skipping the check?Show answer
Always substitute back into both original equations.
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