Question

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?

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

Answer 1

@ThisGirlPretty @Elsa213 @NOpanda14

Answer 2

step 2 has the error

Answer 3

Oh... its B then?

Answer 4

they didn't distribute the 3 with the 2

Answer 5

yes its b

Answer 6

Step 2 contains the error. They did not distribute 3 correctly.

\(\bf{3(4x-2) \rightarrow \color{red}{ 12x-6}}\)

Answer 7

Okay, thank you!!!😜😄😎

Answer 8

no problem

Answer 9

any time