\[ \frac{x}{x + 7} = \frac{5}{14} \], \[ \frac{3x - 2}{x + 2} = 1 \], \[ \frac{x}{x - 2} = \frac{1}{1 + 1} \] d) \[ \frac{x}{5} + \frac{3}{2} = 2 \]

----- Nội dung ảnh -----
a)
\[
\frac{x}{x + 7} = \frac{5}{14}
\]

b)
\[
\frac{3x - 2}{x + 2} = 1
\]

c)
\[
\frac{x}{x - 2} = \frac{1}{1 + 1}
\]

d)
\[
\frac{x}{5} + \frac{3}{2} = 2
\]