Question 517042
length of side of square =x
length of side of triangle = 2x-8

...
perimeter of squale = 4L
perimeter of equilateral triangle = 3a
4L=3a

4x=3(2x-8)
4x=6x-24
-2x=-24
/-2
x=12  the side of square

side of triangle = 2x-8 => 2*12-8=>16