The key to solving this problem is understanding properties of exponents: If you are multiplying two powers with the same base (in this case the base is 6), the result is the base raised to the power of the two exponents added together.
6^1/3+1/4 = 6^x/y 6^7/12 = 6^x/y
So the product would be 6^7/12 x = 7 y = 12</span>
