Six times $x$ increased by $12$ equal to:

Five times y diminished by 20 is equal to:

The number less than 15 by 7 is:

The excess of thrice a certain number over 16 is 32. The number is:

A number, the sum of whose fourth and fifth parts exceeds their third part by 28 is:

Find the value of the question mark?

$\frac{1}{15}+\frac{{\displaystyle 3}}{{\displaystyle 15}}+\frac{{\displaystyle 5}}{{\displaystyle 15}}+\frac{{\displaystyle 6}}{{\displaystyle 15}}=?$

A number one sixth of which exceeds its one ninth by 100 is: