GCSE Secondary Maths Age 13-17 - Algebra: Subject of Formula - Explained

The video tutorial explains how to make P the subject of a formula. It begins with an introduction to the formula and the importance of balancing both sides. The instructor demonstrates how to clear fractions by multiplying both sides by R and then isolates P by removing R from both sides. The tutorial concludes with a discussion on the marks awarded for each step and emphasizes the importance of understanding the process for exams.

What is the initial equation given in the problem?

• Q = P / R + S

• P = Q / R + S

• P = Q * R + S

• Q = P * R + S

What operation is performed to eliminate the fraction in the equation?

• Divide both sides by R

• Multiply both sides by R

• Add R to both sides

• Subtract R from both sides

After eliminating the fraction, what is the next step to make P the subject?

• Subtract R from both sides

• Add R to both sides

• Subtract S from both sides

• Add S to both sides

What is the final expression for P after rearranging the formula?

• P = QR + S

• P = QR + R

• P = QR - R

• P = QR - S

How many marks are awarded for correctly multiplying both sides by R or subtracting R from both sides?

• One mark for either operation

• No marks for these operations

• One mark for each operation

• Two marks for each operation