12=-4(-6x-3) I need help with my math question, I also need work to be shown, someone please help me. TwT

x = 0

Step-by-step explanation:

Solve for x:

12 = -4 (-6 x - 3)

12 = -4 (-6 x - 3) is equivalent to -4 (-6 x - 3) = 12:

-4 (-6 x - 3) = 12

Divide both sides of -4 (-6 x - 3) = 12 by -4:

(-4 (-6 x - 3))/(-4) = 12/(-4)

(-4)/(-4) = 1:

-6 x - 3 = 12/(-4)

The gcd of 12 and -4 is 4, so 12/(-4) = (4×3)/(4 (-1)) = 4/4×3/(-1) = 3/(-1):

-6 x - 3 = 3/(-1)

Multiply numerator and denominator of 3/(-1) by -1:

-6 x - 3 = -3

Add 3 to both sides:

(3 - 3) - 6 x = 3 - 3

3 - 3 = 0:

-6 x = 3 - 3

3 - 3 = 0:

-6 x = 0

Divide both sides of -6 x = 0 by -6:

(-6 x)/(-6) = 0/(-6)

(-6)/(-6) = 1:

x = 0/(-6)

0/(-6) = 0:

x = 0

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.