Question

I was told that 3x- was -12 but I can’t understand how they got -12:/

Answer 1

Answer:

6

Step-by-step explanation:

They got 3x-12 because they took

3(x - 4)

and they distrubuted the 3 to the numbers in parenthesis,

how they did this was they multiplied 3 by x and got 3x then they kept the subtraction sign that is in the parenthesis. Then they multiplied 3 by the 4 and got 12.

then the equation was 3x - 12/2 = 6

Answer 2

Answer:

x=8

Step-by-step explanation:

$\frac{3(x - 4)}{2} = 6$

Multiply 3 by what's in the bracket

$\frac{3x - 12}{2} = 6$

Multiply through by the LCM of all the denominators

$\frac{2(3x - 12)}{2} = 2 \times 6$

=The numerator 2 will cancel the denominator 2

$3x - 12 = 12$

Grouping like terms

$3x = 12 + 12$

Dividing both sides by 3

$\frac{3x}{3 } = \frac{24}{3}$

$x = 8$