4y-6-5y/7 =-3

The / is division sign
Explain

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.

What is the distance between point a and b

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?