Mathematics, 09.12.2019 17:31 bunbun2913

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?

Answers: 3

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

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