10. Solve for y in the equation - y + 9 = 23.

A. y=-14

B. y = 14

O C. y = 32

D. y=-32

It is A because you have to divide by a negative one

A. y = - 14

Step-by-step explanation:

Subtract 9 from its self and from 23 in order to isolate - y

-y + 9 = 23

- 9 - 9

0 14

-y is now Isolated.

-y = 14

Generally, when you have a letter representing a number by itself such as - y, it is indicated that therecis always a 1, example - y = - 1y, x = 1x, however 3y does not equal 13y or 31y. 3y already has a number in front of it so therefore, there is no need to include the number 1 in front of y.

Because - y is the same as - 1y, that is a multiplation representation. - y is the same as - 1 x y so the next step is to isolate y from - 1. In order to do that, you will need to divide - 1 by 1 and 14 by 1. (Remember, (-) (-) = + and (-) (+) = - and (+) (+) = +.)

-y = 14

-1 - 1

y = - 14