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12 cards from this deck
Variable on left-hand side, expressed in terms of others
Rearranging so different variable appears alone on left
Same operation on both sides keeps equation unchanged
Add, subtract, multiply, or divide
Identify the variable you want to make the subject
Work in reverse order - undo last operation first
Outer layers first (work in reverse order)
Clear fractions early by multiplying through by denominators
When it appears in multiple terms
Substitute answer back into original equation
Forgetting to change the sign
Check your final answer makes sense
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