If ab + 2c = c, then c =

1. 2ab + c

2. 4abc

3. 3abc + 4c

4. c + 2ab

I need assistance with this math problem and would like to understand it so that I may show the work.

ab+ 2c=c

ab=c-2c

ab=-c

c=- ab

ab + 2c = c

2c - c = -ab

c = -ab

ab + 2c = c

2c - c = -ab

c = -ab

None of the other answers is correct.

ab + 2c = c

ab = c - 2c

ab = (1 - 2)c

ab = -1(c)

c = -ab

1.

2ab + c

2ab - ab = ab

2.

4abc

4(-c)(c) = -4c^2

3.

3abc + 4c

3(-c)(c) + 4c

-3c^2 + 4c

4.

c + 2ab

c + 2(-c)

c - 2c = -c

Hope that helps!!!!

If ab + 2c = c

Subtract 2c from each side: ab = -c

Multiply both si=des by -1: -ab = c.

However, since "c = -ab" is not one of your choices, can you use algebra to get to any of the other choices? I can't!

If: ab +2c = c

Then: c = -ab

None of the given options are correct.

ab + 2c = c

c = - ab

= 2ab + c → recall: c = - ab

= - 2c + c

= - c

= 4abc → recall: c = - ab

= - 4 * c * c

= - 4c²

= 3abc + 4c → recall: c = - ab

= [- 3 * (- ab) * c] + 4c → recall: c = - ab

= [- 3 * c * c] + 4c

= - 3c² + 4c

= c + 2ab → see above

= - c

As Ricki said, c = -ab.

None of the multiple choice answers is correct.

Are you sure you copied the problem correctly? Or is your teacher a moron?

Subtract 2c from each side

Multiply both sides by -1

c = -ab

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