Solve: 7-4(x-1) = 20 step 1: 7-4x + 1 = 20 step 2: 8-4x = 20. step 3: (-1/4) -4x = 12 (-1/4)step 4: x=-3 which is the first incorrect step in the solution shown above a. step 3 b. step 4 c. step 1 d. step 2

Which of the expressions (on the photo document i inserted) together represent all solutions to the following equation? 8cos(12x)+4=-4 *the answer should be in degrees.* > i would like for someone to explain the process to find the solutions for this.