Respuesta :

Answer:

[tex]10y+4[/tex]

Step-by-step explanation:

We begin with the given equation [tex]-9 + 8y + 12 -(- 2y) + 1[/tex]

First, we need to remove the parenthesis. Subtracting a negative value is the same as adding, so we can rewrite this as

[tex]-9 + 8y + 12+2y + 1[/tex]

Now, we need to add like terms. This means that we need to add the regular numbers together and then all of the numbers with y together

[tex]-9 + 8y + 12+2y + 1\\\\8y+2y+12+1-9\\\\10y+4[/tex]

And there is our simplified expression