Ineed asap only answer if you can explain your answer

If 1 is divided by the sum of y& 4.the result is equal to 3 divided by 4, find the value of m

Ill mark the brainliest if you me with the these three questions 7,8,9

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.