channael127
contestada

The work of a student trying to solve the equation 3(4x − 2) = 9 + 2x + 5 is shown below:

Step 1: 3(4x − 2) = 9 + 2x + 5
Step 2: 12x − 2 = 14 + 2x
Step 3: 12x − 2x = 14 + 2
Step 4: 10x = 16
Step 5: x = 1.6

In which step did the student first make an error and what is the correct step?

1) Step 2: 12x − 2 = 4 + 2x
2) Step 2: 12x − 6 = 14 + 2x
3) Step 3: 12x + 2x = 14 + 2
4) Step 3: 12x − 2x = 14 − 2

Respuesta :

jcherry99
Step 1 gives you 
3*(4x - 2) on the left hand side.

When you remove the brackets what you get is
3*4x - 3*2
12 x - 6 You have to distribute on both sides of the plus sign. The answer is the second one down.

So the answer is 2) <<<< answer.
bryannprospere4

Answer:

Step 2: 12x − 6 = 14 + 2x

Step-by-step explanation:

i just took the test

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