For what value(s) of $h$ and $k$ does the linear system have infinitely many solutions?

$$\begin{array}{rcrcr} 3 x_1 & - & 5 x_2 & = & 3\\ h x_1 & + & k x_2 & = & 5 \end{array}$$

$h$ select = ≠ and $k$ select = ≠

Note: $h$ and $k$ must be integers or fractions reduced to lowest terms.