Respuesta :

bdrdivya123

Step-by-step explanation:

28y-42-5y=-21

28y-42=-21+5y

-42=-21+5y-28y

-42=-21-23y

42=21+23y

23y=42-21

23y=21

y=21/23

Tasyha

Answer:

y = 15

Step-by-step explanation:

[tex] \frac{4y - 6 - 5y}{7} = - 3[/tex]

➡️ [tex] \frac{ - y - 6}{7} = - 3[/tex]

➡️ [tex] - y = 6 = - 21[/tex]

➡️ [tex] - y = - 21 + 6[/tex]

➡️ [tex] - y = - 15[/tex]

➡️ [tex]y = 15[/tex]