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10 questions from this quiz
An equation with several letters/variables
Changing the subject of the formula
A=πr2A = \pi r^2A=πr2
Treat them as if they were numbers
The opposite operation to both sides
Take it out as a common factor
There are positive and negative answers
Multiply both sides by the LCD
h=2Abh = \frac{2A}{b}h=b2A
Always check by substituting back
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