The work of a student to solve the equation 2(3x − 4) = 8 + 2x + 4 is shown below:
step...
Mathematics, 03.02.2020 12:43 avaryan84
The work of a student to solve the equation 2(3x − 4) = 8 + 2x + 4 is shown below:
step 1: 2(3x − 4) = 8 + 2x + 4
step 2: 5x − 6 = 12 + 2x
step 3: 5x − 2x = 12 + 6
step 4: 3x = 18
step 5: x = 6
in which step did the student first make an error and what is the correct step?
step 2; 6x − 6 = 2(6 + x + 2)
step 2; 6x − 8 = 12 + 2x
step 3; 5x − 2x = 12 − 6
step 3; 5x + 2x = 12 + 6
Answers: 3
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