$7$ times a number decreased by the sum of $2$ and $15$ equals $46$. What is thrice the number?

Write the following in algebraic form:

Seven added to, eight times a number divided by two.

Write the following in algebraic form:

 The quotient obtained by dividing a number by twenty multiplied by six and added to the seven.

The length of a box is $\mathrm{16cm}$ more than twice its width. If the width is $\mathrm{ycm}$, what is its length? Find out the area of the box when $\mathrm{y}=1$.

I am an integer. When you multiply me by $2$ and subtract $10$ from me, the result is $-6$ . Who am I?

The product of a number $\mathrm{x}$ and$7$ is $56$. Find the number.