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
