9.
which of these is a simplified form of the equation 6y + 4 = 8 + 2y + 2y? (5 points)

6y = 8
10y = 12
2y = 4
4y = 12
10.
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? (5 points)

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