KS4. Changing the Subject of a Formula. Exercise Set 3 (Variable on denominator)

Now we will increase the difficulty a little and start to introduce more algebra and fractions into our formulae.

Worked examples

  • Make x the subject of the following equations:
    • \frac{56}{x} = 8
    • \frac{y}{x} = 8
    • \frac{10}{x} = \frac{1}{3}
    • \frac{a}{x} = \frac{y}{b}
    • \frac{a}{x+2} = b
    • \frac{a}{x+2} = b
    • a - \frac{b}{x} = c
    • \frac{a}{bx} - c = d

Exercise

Note: If you haven’t yet studied trigonometry, feel free to skip questions 8 and 9 of exercise 6!

Answers

The answers are below:

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