Pl tell me how to do this 40 points i’ll even mark the brainliest

Solve: 3x+y=6 4x-2y=18 show all work !

The area of a rectangle is 10 cm^2. one side of the rectangle is x cm. express the perimeter of the rectangle in terms of x and show that this rectangle cannot have a perimeter of 12 cm. the perimeter of the rectangle in terms of x is __ cm

Are the corresponding angles congruent? explain why or why not.