If a certain number is increased by 5 one half of the result is three-fifths of the excess of 61 over the number find the number

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.

Which expression is equivalent to -5(3x - 6/7)

See attachment below and find the equivalent of tan(∠qsr)