For the first one, you would want to get x by itself so subtract 80 to the other side, which you get 27. Then you would only have 3x, so to get rid of that 3 you would divide 3 on both sides, having x=9. For the second problem you would do the opposite of dividing which is multiplying. So to get x by itself you would multiply 62 on both sides. 62 x 2 = 124. So x=124.
