Question

Which equation has solution x = -3?
A) 2x - 7 = -1
B) 3x + 8 = 1
C)
1
2
x + 8 = 10
D)
1
2
(2x - 6) = -6

Answer 1

Do you mind writing this out a little bit better? I am having a hard time reading the question with the random 1's and 2's.

Answer 2

Yes

Answer 3

Which equation has solution x = -3?
A) 2x - 7 = -1
B) 3x + 8 = 1
C)1/2/ + 8=10
D)1/2(2x-6)=-6

Answer 4

Oh okay that makes more sense

Answer 5

Sorry i took so long

Answer 6

Is C) supposed to be

C) 1/2x + 8=10

instead of

C) 1/2/ + 8=10

Answer 7

Yes you are right sorry dear :)

Answer 8

No biggey....

okay so the easiest way to do this is to just plug in -3 wherever we see x...and if the equation is equal to itself we have the answer...

A) 2x - 7 = -1

Multiply 2 adn -3

Answer 9

A) 2x - 7 = -1

A) 2(-3) - 7 = -1

Answer 10

Thank you so much , Do you have time for more

Answer 11

First off, what is the answer?

Answer 12

Firth A

Answer 13

First

Answer 14

No, I am sorry...i think I mislead you...

you need to do this for each of the answers!

So for the first one, what is 2 times -3?

Answer 15

-6

Answer 16

Yes...-6 + -7 is what?

Answer 17

-13

Answer 18

Yes, exactly. Which means we now have the equation...

-13=-1

-13 IS NOT equal to -1 so A is not the correct answer.

Answer 19

Right

Answer 20

Now for B...

3x + 8 = 1

What is 3 times -3? (remember this is because wherever we see an x, we plug in -3 for it.

Answer 21

0

Answer 22

No, 3 TIMES -3..not 3 + -3

Answer 23

Oh sorry , -9

Answer 24

You're cool :)

You are also correct

-9 + 8 = 1

-9 ADDED to 8 is what? (-9 + 8)

Answer 25

1

Answer 26

No, here, do this in a calculator...


8 - 9

and see what you get

Answer 27

-1

Answer 28

Yup!

-1 = 1

-1 and 1 are not the same thing...so B is not right either

Answer 29

Eliminated

Answer 30

C )1/2x + 8 = 10

What is 1/2 TIMES -3/1?

Remember that with any number that is NOT a fraction we can divide it by 1 and it will always be the original number.

So do 1/2 times -3/1

Answer 31

Do you understand this?

Answer 32

Im trying to work it out

Answer 33

-3/2

Answer 34

Yup!

C ) -3/2 + 8 = 10

Now comes the part I HATE in math....

So now we need to add a fraction (-3/2) and a normal number (8)

So...make 8 become 8/1...but the denominator (the bottom of the fraction) are differnt and we cannot add them this way....so we have to make the denominators the same. Multiply 8/1 by 2/2....so do 8 times 2 and then do 2 * 1

Answer 35

16/2

Answer 36

Yes.

Now add the numerators (the top of the fractions) together. the denominators will still be 2.

What is -3 + 16?

Answer 37

Or a better way to write this is what is 16 - 3?

Answer 38

13

Answer 39

C ) 13/2 = 10

Now divide 13 by two...

Answer 40

6r1

Answer 41

Yup! And 6r1 is NOT EQUAL to 10, so C is also out.

That means the only answer can be D....


D) 1/2 (2x-6) = -6

I will do this one for you...

D) 1/2 (2(-3)-6) = -6

D) 1/2 (-6 - 6) = -6

D) 1/2 (-12) = -6

D) 1/2 TIMES -12/1 = -6

D) -12/6 = -6

D) -6 = -6

And -6 IS EQUAL TO -6, so D is out answer

Answer 42

Did you get it