Question

*brianliest* (07.01)What is the value of y in the equation 9 + y = 8?

72
17
1
−1

Answer 1

-1+9 is the same thing as 9+-1

Answer 2

y =-1

Last option is correct.

Explanation:

The given equation is
`9+y=8`

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

`9+y-9=8-9`

On simplifying, we get

`y=-1`

Hence, value of y is -1

Last option is correct.