Answer:
y =-1
Last option is correct.
Step-by-step explanation:
The given equation is [tex]9+y=8[/tex]
In order to solve for y, we need to isolate y.
In this equation 9 is added with y and hence in order to eliminate 9 from the left hand side, we do reverse operation of addition.
The reverse operation of addition is subtraction. Hence, we subtract 9 to both sides of the equation
[tex]9+y-9=8-9[/tex]
On simplifying, we get
[tex]y=-1[/tex]
Hence, value of y is -1
Last option is correct.
