Question

Consider the system of equations: 3x+2y=18 and x-2y=14.
What property is used to transform the equation
x-2y=14 into -3x+6y=-42?

A. addition property of equality
B. substitution property of equality
C. multiplication property of equality
D. division property of equality

Answer 1

@party_girl

Answer 2

I believe it's C

Answer 3

Thanks.

Answer 4

Welcome

Answer 5

@party_girl Don't give answers.

Answer 6

@TexMechanica Look at the difference between the numbers in those 2 equations.

1, -3
-2, 6
14, -42

See a relationship?

Answer 7

Try Adding, Subtracting, Multiplying, and Dividing them to see if you get the same result from each of the 3 pairs of numbers.

Answer 8

All i did was say i believe it's

Answer 9

@party_girl It doesn't matter, it's still a direct answer. Just because it's what you "think" doesn't get you out of it.

Answer 10

So what

Answer 11

You'll be banned for it, that's what.

Answer 12

Did you find the relationship?

Answer 13

Well nobody told me that

Answer 14

You agreed to read the code of conduct when you joined. That rule is in there.

http://openstudy.com/code-of-conduct

Answer 15

No, I'm still working on it.

Answer 16

I think it's the substitution method.

Answer 17

No, that's incorrect.

-3, 1
6, -2
-42, 14

Add these numbers individually.

-3 + 1 = ?
6 + -2 = ?
-42 + 14 = ?

Answer 18

-2, -4, -28

Answer 19

Yes, are those numbers equal to each other?

Answer 20

6 + -2 is actually 4, not -4.

Answer 21

The numbers are not equal to each other.

Answer 22

Oh, i got it. It's the multiplication property.

Answer 23

Yes..because when you divide them you get -3.

So they multiplied -3 to the first equation to get the 2nd.

Answer 24

So I'm right?