What is the value of x when - 3x + 7x = - 12?

A) - 3

B) - 6/5

C) 3

D) 4/7

The answer is A.) - 3

Step-by-step explanation:

x (-3 + 7) = - 12 use distributive property to factor out the x. So

x (4) = - 12 add the like terms inside parenthesis

¼ * 4x = - 12 *

1

4

multiply both side by the reciprocal of 4

x = - 3 final answer

-3x + 7x = - 12

You need to add like terms.

4x = - 12

Then, you need to divide both side by 4.

x = - 3

So the answer is:

A) x = - 3