Respuesta :

Answer:

15

Step-by-step explanation:

y= 15 because 5 x 15 is 75 and 51+54+75= 180

Answer:

y=15

Step-by-step explanation:

51+54=105

180-105=75

75÷5=15

y=15

OR

5y+51+54=180⁰

5y+51=126

5y=75

y=75÷5

y=15