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Rearranging a two-step formula

Rearranging a two-step formula.

  • Identify which operations act on the required subject.
  • Undo those operations in reverse order, applying each step to both sides.
  • Keep a whole expression together in a numerator when dividing both sides.

Example 1

Make the subject of the formula.

Undo the added or subtracted term first.

Example 2

Make the subject of the formula.

Multiply both sides to clear the denominator.

Your turn

Question 1

Make the subject of the formula.

Check answer
Undo the added or subtracted term first.

Write the subject on the left once it is isolated. The same operation must be applied to both sides.

Question 2

Make the subject of the formula.

Check answer
Multiply both sides to clear the denominator.

Write the subject on the left once it is isolated. The same operation must be applied to both sides.

Question 3

Make the subject of the formula.

Check answer
Undo the added or subtracted term first.

Write the subject on the left once it is isolated. The same operation must be applied to both sides.

Question 4

Make the subject of the formula.

Check answer
Multiply both sides to clear the denominator.

Write the subject on the left once it is isolated. The same operation must be applied to both sides.

Question 5

Make the subject of the formula.

Check answer
Undo the added or subtracted term first.

Write the subject on the left once it is isolated. The same operation must be applied to both sides.

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