Which of the following sets of values is a soulution to the following system of liner expressions, 4x+y=24 x-y=-4 x=4, y=8 x=2, y=6 x=1, y=1 x=5,y=4 show your work : ) will mark brainliest

The perimeter of an equilateral triangle is 4 cm more than the perimeter of a square and the length of a side of the triangle is 8 cm more than the length of a side of the aware. find the length of a side of the equilateral triangle