Respuesta :

the answer is 4 because since the triangle is a equilateral all of the angles are the same so 3(9y+24) = 27y+72 then you set 27y+72 equal to 180........ 27y+72=180 then subtract 72 from 180...... 27y=108 then divide 108 by 27 and 108/27= 4