AI generatedAlgebraGCSE Higher / IGCSE Extended

Rearranging a formula containing algebraic fractions

Identify the subject you want, including any occurrences inside denominators.

  • Identify the subject you want, including any occurrences inside denominators.
  • Multiply both sides by the denominator, then collect and isolate the subject.
  • State any non-zero conditions introduced by division and retain the original denominator restrictions.

Example 1

Make the subject. State the restrictions.

Multiply both sides by .Divide by , which must be non-zero.Subtract 3 from both sides.

Example 2

Make the subject. State the restrictions.

Multiply both sides by .Divide by , which must be non-zero.Subtract 3 from both sides.

Remember
Use the worked steps to check your method, not just the final answer.

Your turn

Question 1

Make the subject. State the restrictions.

Check answer
Multiply both sides by .Divide by , which must be non-zero.Subtract 3 from both sides.

and the original restriction remain.

Question 2

Make the subject. State the restrictions.

Check answer
Multiply both sides by .Divide by , which must be non-zero.Subtract 3 from both sides.

and the original restriction remain.

Question 3

Make the subject. State the restrictions.

Check answer
Multiply both sides by .Divide by , which must be non-zero.Subtract 3 from both sides.

and the original restriction remain.

Question 4

Make the subject. State the restrictions.

Check answer
Multiply both sides by .Divide by , which must be non-zero.Subtract 3 from both sides.

and the original restriction remain.

Question 5

Make the subject. State the restrictions.

Check answer
Multiply both sides by .Divide by , which must be non-zero.Subtract 3 from both sides.

and the original restriction remain.

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