203k views
2 votes
If 2m−6=8m then 3m= A. 3 B. -1 C. -3 D. -6 E. I don't know.

User Raxr
by
7.3k points

1 Answer

1 vote

For this case we have to:


2m-6 = 8m

If we subtract 8m on both sides of the equation, we have:


2m-6-8m = 8m-8m\\-6m-6 = 0

Adding 6 to both sides of the equation:


-6m-6 + 6 = + 6\\-6m = 6

Dividing between -6 on both sides of the equation:


\frac {-6m} {6} = \frac {6} {6}\\-m = 1

So:


m = -1

If we want to know the value of 3m, then:


3m = 3 (-1) = - 3

Answer:

Option C


User Sarang
by
8.0k points