Perimeter, Probability, and solving an expression

1. One side of a triangle is 4 cm longer than the shortest side and 2 cm shorter than the longest side. The perimeter is 38 cm. Find the dimensions of the triangle.

2. A spinner with eight equal sections numbered 1 through 8 is spun 50 times. The number 3 is recorded 8 times. Determine the experimental probability of spinning an 8.

3. Solve bx – cx = 7 for x.

Please..help. I would really appreciate it, i need it in soon. Reviewing for my exams. (Speechless)