CAN SOMEONE PLEASE HELP ME WITH THESE TWO QUESTIONS

For the equations below which statement is true ? -2x=14 6x=-42

The measure of one angle of an octagon is two times smaller that of the other seven angles. what is the measure of each angle?

The linear combination method is applied to a system of equations as shown. 4(.25x + .5y = 3.75) → x + 2y = 15 (4x – 8y = 12) → x – 2y = 3 2x = 18 what is the solution of the system of equations? (1,2) (3,9) (5,5) (9,3)