Answer:
<h2>x = 4, y = 12 → (4, 12)</h2>
Step-by-step explanation:

Add one on both sides of the equation. You would end up with -6=x/3. You would then cross multiply, so -6 times 3 and 1 (the denominator for -6) times x and you would get -18=x
One troy ounce of silver is worth, $17.67.
HOPE THIS HELPS YOU! ^_^