01Variables and equivalence
A variable represents a number or quantity. Every algebraic transformation must preserve the equivalence of the original expression or equation.
02One valid step at a time
Write each transformation on a new line and apply the same valid operation to both sides. This keeps the solution easy to audit.
03Substitute and verify
A final value is not a complete solution until it is substituted into the original relation. Verification catches sign and expansion errors.
04Expanding brackets
Use a suitable representation, state the rule, and keep every numerical or algebraic step equivalent. Finish with estimation, an inverse operation, or substitution as a check.
05Factorising simple expressions
Use a suitable representation, state the rule, and keep every numerical or algebraic step equivalent. Finish with estimation, an inverse operation, or substitution as a check.
06Solving linear equations
Use a suitable representation, state the rule, and keep every numerical or algebraic step equivalent. Finish with estimation, an inverse operation, or substitution as a check.
07Linear inequalities
Use a suitable representation, state the rule, and keep every numerical or algebraic step equivalent. Finish with estimation, an inverse operation, or substitution as a check.
08Sequences and nth term introduction
Use a suitable representation, state the rule, and keep every numerical or algebraic step equivalent. Finish with estimation, an inverse operation, or substitution as a check.