Question 1(multiple choice worth 5 points) (07.05 hc)
the work of a student to solve the equation 3(2x − 4) = 8 + 2x + 6 is shown below: step 1: 3(2x − 4) = 8 + 2x + 6 step 2: 5x − 7 = 14 + 2x step 3: 5x − 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 − 12 = 14 + 2x
step 2; 6x − 7 = 2(6 + x + 4)
step 3; 5x − 2x = 14 − 7
step 3; 5x + 2x = 14 + 7