On a piece of paper, graph y=-3x-2

The triangles are similar. what is the value of x? show your work.

Adrawer contains 12 identical white socks, 18 identical black socks and 14 identical brown socks. what is the least number of socks you must choose, without looking, to be certain that you have chosen two socks of the same colour?

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)