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irakobra [83]
3 years ago
12

10. Solve for y in the equation -y + 9 = 23. A.y=-14 B.y = 14 O C. y = 32 D.y=-32

Mathematics
2 answers:
azamat3 years ago
6 0

Answer:

A. y = -14

Step-by-step explanation:

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

-y + 9 = 23

<u>- 9</u> <u>-9</u>

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 (+) (+) = +.)

<u>-y </u>= <u>14</u>

-1 -1

y = -14

KiRa [710]3 years ago
3 0
It is A because you have to divide by a negative one
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