The sides of an equilateral triangle are, 3x+y, 2y+x and y+3. Find the perimeter of the triangle

Answer 1

3x+y + 2y + x + y +3 = 4x +4y + 3 = the perimeter

3x+y =2y+x

2x = y

3x+y = y+3

3x =3

x =1

y =2x = 2

each side = 5

the perimeter = 15