The work of a student to solve the equation 3(2x ā 4) = 8 + 2x + 6 is shown below:
step 1: 3...
Mathematics, 29.08.2019 00:00 daisyramirez2057
The work of a student to solve the equation 3(2x ā 4) = 8 + 2x + 6 is shown below:
step 1: 3(2x ā 4) = 8 + 2x + 6
step 2: 5x ā 7 = 14 + 2x
step 3: 5x ā 2x = 14 + 7
step 4: 3x = 21
step 5: x = 7
in which step did the student first make an error and what is the correct step?
step 2; 6x ā 12 = 14 + 2x
step 2; 6x ā 7 = 2(6 + x + 4)
step 3; 5x ā 2x = 14 ā 7
step 3; 5x + 2x = 14 + 7
Answers: 1
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