An equilateral triangle has a perimeter of 12x+ 18 units. Which expression can be used to show the length of one side of
the triangle?
6(2x+3): Each side length is 2x+ 3 units.
3(4x+6). Each side length is 4x+6 units.
2(6x+9). Each side length is 6x+9 units.
x(12+ 18). Each side length is 12+ 18 units.