Find x if x + y = 16, x * 3 is even, x is a factor of y, and 2x+y= 20.

Find the solution of this system of equation -7x+y=-20 9x-3y=36

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.

If a || b and e || f , what if the value of y ?