How do i solve 2b + 3c=

If you are trying to move an attached term across the equal sign (=), what operation would you use to move it?

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 solution to this system of equations? y= 2x - 3.5 x - 2y = -14