Optional callout text right side.

**Note:** This tutorial mainly targets O/L & A/L students.

I know, we all know making the subject of (for example) x is a simple thing in a simple equation/sum – which basically anyone should be able to do. What about a hard/confusing one?

This is going to be more than just a tutorial. Let’s make this a quiz. I will do 4 hard questions along with detailed workings. First try it yourself then check the answer(s). Ok? Great!

**Questions**

1. Make y the subject of this equation.

- P = (a-y) / (b-y)

2. Make W the subject of this equation.

- A = 2(LW + WH + HL)

3. Make ‘t’ the subject of this equation.

- T = a (R+r)(R-r) + t

4. Make v the subject of this equation by finding its value! (Given that f=6 and u=7)

- 1/f = 1/u + 1/v

**Answers**

(first)

(second)

(third)

(fourth)

*– thanks for your comments*

Comments are closed.

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