Plz help in a quiz and have a time limit

If 5x - 2 = -12, then x = a) -50 b) -4.4 c) -2.8 d) -2

What’s the answer? and how do i solve it ?

Why can't my rank go i have 1723 points, but my rank is only at ambitious, which is only 250 points! like, (p.s. i know this isn't related to math, but i just don't know why it's doing this and i would really appreciate if someone could tell me whats going on with this)