Changing the subject with multiple algebraic fractions

12 questions

1. What is the solution to the equation {8\over a}=6?
2. Make x the subject of {2\over 5x} = 3y.
3. Make a the subject of x=\frac{y+5}{a-b}.
4. Factorise x^2-5x-6.
5. Which of these is equivalent to {3x^2-12x\over x^2-9x+20}?
6. Which of these is the simplest form of {3\over 2x+4}+{7\over 5x+10}?
7. In which of these is a the subject?
8. Make a the subject of 5=\frac{b+2a}{a+4}.
9. Which of these is equivalent to 4+b=\frac{3a-4}{2b+1}?
10. Make a the subject of \frac{a}{4} + \frac{3}{b}= \frac{c+2}{5}.
11. Make a the subject of \frac{6b+3}{c}=\frac{4b+2}{a}.
12. Make a the subject of \frac{2}{c} = \frac{2}{b} - \frac{2}{a}.

License: OGL