Respuesta :

Answer:

y = 0

Step-by-step explanation:

y - 7 = -7

Add 7 to each side

y -7 = -7

+7      +7

y = 0

Y=0
Start with adding 7 to both sides since addition is the opposite of subtraction
Y-7=7
+7 +7
Both cancel each other out
You’re left with y=0