What is the value of 6x if 3(x-4) + x = -2

A. 2.4
B. 2.5
C. 12
D. 15

D. 15

3(x-4) + x = -2

3x - 12 + x = -2....................distribute
....+ 12.........+12..................add 12 to both sides

3x.......+ x = 10 ............cancel 12 out and simplify

4x = 10 .........................combine like terms 3x and x

x = 10/4 ....................divide both sides by 4

x = 5/2 .....................simplify



6x = 6(5/2)................plug-in
6x = 30/2 = 15

Value of x:
3(x - 4) + x = - 2
3x - 12 + x = - 2
4x = 10
x = 10/4 OR 2.5

Value of 6x:
= 6(2.5)
= 15

Answer: D. 15

3*(x - 4) + x = -2

3x - 12 + x = -2

4x - 12 = -2

4x = 10

x = 5/2

6x = (5/2)*6

6x = 15