1.
[tex]xyz = 2a | \div xy| [/tex]
[tex]z = \frac{2a}{xy} [/tex]
2.
[tex]f = \frac{ab - c}{3} | \times 3| [/tex]
[tex]3f = ab - c[/tex]
[tex]3f + c = ab | \div a| [/tex]
[tex]b = \frac{3f + c}{a} [/tex]
3.
[tex]t = 10s(v - 2x) | \div 10s| [/tex]
[tex] \frac{t}{10s} = v - 2x[/tex]
[tex]v = \frac{t}{10s} + 2x[/tex]
