A) Answer:
[tex]x = \frac{2y + 21}{5} [/tex]
B) Answer:
[tex]x = \frac{4 - ry}{2 - t} [/tex]
C) Answer:
[tex]x = \frac{9y}{4 - k} [/tex]
D) Answer:
This equation has no solution for X. but for n the answer would be,
[tex]n = m - x - ex[/tex]
E) Answer:
[tex]x = \frac{u(v - 1)}{7} [/tex]
