12. Alexa solves an equation using the steps below as her first three steps. Step 1: 3(x - 4) = x + 8 Step 2: 3x - 12 = x + 8 Step 3: 2x – 12 = 8 Which operation did Alexa use on both sides of the equation to go from Step 2 to Step 3? A subtracted 8 B subtracted x C added 2x D added 12

B. Subtracted x

Step-by-step explanation:

b) She subtracted x from both sides

Step-by-step explanation:

Step 1: 3(x - 4) = x + 8

Step 2: 3x - 12 = x + 8

Step 3: 2x – 12 = 8

3(x - 4) = x + 8

3x - 12 = x + 8

- x        - x (here, she subtracted x from both sides)

2x - 12 = 8

Hope this helps!

set each factor equal to 0

4x-3 = 0

2x-1 = 0

solve for x.

4x-3=0

4x=3

x= 3/4

solve for x. 

2x-1= 0

2x= 1

x= 1/2

your answer should be 1/2 is less than or equal to x and 3/4 is greater than or equal to x

1. perpendicular

2. parallel

3. perpendicular